NetElixir University PLA Profit Zone White Paper
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Transcript of NetElixir University PLA Profit Zone White Paper
1
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2
3 Executive Summary
4 Detailed Findings
4 Introduction
5 Hypotheses
6 Methodology
6 Findings
6 Hypothesis Evaluations
8 PLAs Behavior Varies By Business Type
15 PLAs Are More Effective Than NTM ads
17 The Law of Diminishing Returns Applies to PLAs
20 PLA “Sales & Profit Zone”
25 Strategic Implications
25 Strategic Questions To Ask
26 Role of PLAs in Marketing Strategy
27 For More Information
28 Appendix
28 Appendix A – Glossary
29 Appendix B PLA Performance ROAS vs Cost %
3
After our recent study on maximizing the value of your SERP results, we were still curious in
particular about the impact that product feed-driven ads have on online retailers’ businesses.
Given the share of space that Google and Bing allot to PLAs, most advertisers feel like they have
to play in this space, or they might miss out on a huge chunk of their audience. However, we
wanted to find out how much businesses really should be investing in Google Shopping to see a
good return for their money, and if there is a “sweet spot” to invest for optimal PLA performance
and ROI.
To find out, we first came up with our hypotheses on Google Shopping, based on anecdotal
evidence as well as common perceptions from our clients. After that, we then combined and
analyzed 2 years’ worth (CY 2013 and CY 2014) of AdWords performance data to evaluate
our hypotheses
As you will read further in our study, you’ll see that almost all of our hypotheses were confirmed.
So, what does all of this mean for advertisers? As the data in our study shows, PLAs contribution
can be exceptional in some cases-- sometimes even outperforming NTM campaigns by 500%.
Our study will show how PLA revenue and spend contribution have grown to impactful levels, and
that they demand a strategic focus to deliver the results they’re capable of bringing your business.
We’ll wrap up our study with a series of questions to help guide your own PLA strategies to
determine if you are in your “PLA Sales & Profit Zone”!
4
After our recent study on maximizing the value of your SERP results, we were still curious in
particular about the impact that product feed-driven ads have on online retailers’ businesses.
Given the share of space that Google and Bing allot to PLAs, most advertisers feel like they have
to play in this space, or they might miss out on a huge chunk of their audience. However, we
wanted to find out how much businesses really should be investing in Google Shopping to see a
good return for their money, and if there
Following up on our recent study on maximizing the value of your SERP results, we were curious
about the impact that product feed-driven ads (Product Listing Ads and then Shopping Campaigns,
which will be referred to as PLAs heretofore) have had on online retailers’ businesses as well as to
see if there is a “sweet spot” of spend for the optimal PLA performance. You may recall that our
SERP study showed that PLAs (which are relatively new in Google, as they became a paid
medium in August, 2012) can take as much as 33% of the SERP real estate that appears above
the fold is allotted.
Figure 1: Typical SERP from Google for a product-oriented query
5
Figure 2: Bing SERP with Product Ads taking up 29.2% of above the fold viewable space
To find out more, here at NetElixir University we decided to take a look at PLA trends from 2014.
To start out study, we first formulated a set of hypotheses that were based on common perceptions
among our clients, as well as anecdotal evidence.
1. All online retailers and etailers should be using PLAs in their online marketing mix
2. PLAs behavior varies dramatically by type of business
3. PLAs spend and revenue varies by month within market segments
4. PLA share of paid search spend and revenue is growing
5. PLAs are more effective than non-trademark ads, but not as effective as trademark ads
6. PLAs AOV and basket sizes are smaller
7. PLAs conversion rates are higher than non-trademark (NTM ) campaigns’ conversion rates
8. PLAs CPCs are higher
9. PLAs CPAs are lower vs NTM
10. PLA impression share (out of total impressions in the account) is growing
11. The law of diminishing returns applies to PLAs
6
12. Migration to Google Shopping improves PLA performance
13. PLAs produce incremental growth
We aggregated 2 years’ worth (CY 2013 and CY 2014) of AdWords performance data that covered
more than 50% of our client base of online retailers and pure etailers. Next, we segmented this
data into 6 vertical segments:
1. B2B
2. Apparel
3. Gifts
4. Hobby
5. Health & Beauty
6. Home Furnishings
Our dataset, pulled from Google Analytics, covered over 1B impressions and over 15MM paid
search (medium=cpc user sessions. The total transaction revenue from this dataset exceeded
$60MM.
All online retailers and etailers should be using PLAs in their online marketing mix
If this was an episode of Mythbusters, we would rate this hypothesis as “plausible”.
Given the share of space that Google and Bing are allotting to PLAs, it’s easy to see why
advertisers might say to themselves “I have to play in this space, otherwise I am missing a large
chunk of the audience for a given auction”.
We found that PLAs can produce a significant chunk of your paid search revenue. In our study,
the % of paid search revenue from PLAs in 2014 ranged from 1% to 49%, with an average for the
entire year of 13%. Now, if you assume that PLAs are almost 100% incremental (more on this
later), you could look at that average and think to yourself “Hmmm, double-digit growth in my paid
search account if I turn on PLAs…not bad”.
We also found that revenue from PLAs is growing YOY at a healthy rate of 38.4% in 2014. As we
will see a bit later, we also found that PLAs outperform NTM campaigns in a number of key
metrics.
7
So, where’s the catch? Why not rate this hypothesis as “Confirmed”? While we do think everyone
should be using PLAs, you still need to be strategic about your investment in PLAs. Why do we
say that? Profitability. PLAs ROAS for 2014 was 2.4. As you can see in the graph below, a
ROAS of 2.4 requires a gross margin slightly over 40% to break even on the transaction. This
means that if your gross margins are below 40%, you might want to think a bit more about your
PLA strategy.
Figure 3: Break-even Gross Margin Vs. R/C
For example, another question to consider is the lifetime value (LTV) of your customers. If you are
in a below 40% gross margin business that gets most of its LTV from the first transaction,( e.g. you
sell non-consumable, non-perishable items for which most consumers have no need for multiple
versions and therefore repeat purchases are rare), you need to be smart about investing in a
medium where transaction-level profitability might be a challenge. On the other hand, if your
gross margins are above 50%, or you know that your average customer buys 3.6 times again from
you and spends 4.5 times as much as the first order over their lifetime, the decision to invest in
PLAs is a bit easier to make.
There are a number of strategies an advertiser can use in order to achieve profitability in their
PLAs. We’d recommend trying:
1. Only including higher margin items in your product feed
2. Adjusting your bid strategy based on the item’s gross margin, average selling price, and
conversion rate. For example, in NetElixir’s LXR platform, the custom bid management
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feature allows you to set a target ROAS level and target CPA level for each individual ad
group. If you know your AOV trends by ad group, you can then set targets for ROAS and
CPA that ensure your profitability for transactions generated by that ad group.
3. Using day-parting, geo-targeting, and device-level bid adjustments to control when and
where your PLAs appear, to ensure you are exposing them to profitable audiences only.
This hypothesis is true. As indicated above, the % of paid search revenue generated through
PLAs varied dramatically across our dataset from 1% to 49%. As you can see in the below table,
key metrics for PLAs varied widely across our dataset.
Table 1: PLA Key Metric Performance Ranges
% Paid Search Rev 13% 1.0% 49%
% Paid Search Spend 23% 2% 68%
ROAS 2.4 .56 5.14
Basket Size 1.42 1.12 3.7
AOV $72 $35 $198
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As you can see in the following graphs, we found that PLA campaigns’ performance varies
significantly across market segments, as well as within those segments by time of year. Figure 4
shows the aggregated revenue and spend % for the PLA campaigns in our dataset. Because our
dataset is from predominantly B2C businesses, you can see an upward trend in the revenue
contribution during Q4. Overall for Q4, PLAs were 15% of paid search revenue compared to
11.7% for the first 3 quarters.
Figure 4: 2014 PLA Rev % & Spend % By Month
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Below, Figure 5 compares the PLA revenue and cost contribution, as well as the ROAS as
measured by R/C for the 6 segments we used in this study. The size of the bubbles indicates the
relative size of the R/C value for that segment.
Figure 5: PLA Rev vs Cost vs R/C by Segment
B2B Apparel Home
Furnishings
Gifts Hobby Health & Beauty
Because our dataset included a mix of retailers and manufacturers that are selling directly to
consumers via their ecommerce sites, we also compared performance for those 2 segments
relative to the overall performance for 2014, shown below in Figure 6.
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Figure 6: Mfr vs Retailer 2014 PLA Performance
Manufacturers Entire Dataset Retailers
Figures 7 through 12 chart the PLA revenue and spend contribution by month for 2014. One
common theme in these charts is that the spend contribution percentage is almost always greater
than the revenue contribution percentage. The only exception is in the Gifts segment, where you
can see in Figure 12 the impact of the Christmas selling season, as the revenue contribution in
December jumps above the spend contribution.
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Figure 7: 2014 B2B PLA Rev % & Spend % By Month
Figure 8: 2014 Home Furnishings PLA Rev % & Spend % By Month
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Figure 9: 2014 Apparel PLA Rev % & Spend % By Month
Figure 10: 2014 Hobby PLA Rev % & Spend % By Month
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Figure 11: 2014 Health & Beauty PLA Rev % & Spend % By Month
Figure 12: 2014 Gift PLA Rev % & Spend % By Month
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In Figure 4 above, you can see that in 2014, PLAs’ share of revenue and spend did grow from the
beginning of the year to the end of the year. That being said, we didn’t see this as a trend that
holds for all 6 segments. For example, Figures 9 & 10 tell a different story for the Health & Beauty
and Gifts segment. Health & Beauty clearly shows a downward trend in both metrics, while the
Gifts sector shows growth in revenue contribution, while the spend contribution drops over the
course of the year.
There were a number of hypotheses we had regarding the relative performance of PLAs vs NTM
campaigns. We hypothesized that:
1. PLAs AOV and basket sizes are smaller
2. PLA conversion rates are higher than non-trademark (NTM ) campaigns’ conversion rates
3. PLA CPCs are higher
4. PLA CPAs are lower vs NTM
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Table 2 compares these key metrics across the 3 campaign types. The only hypothesis we found
to be not true in 2014 was that PLAs CPCs are higher.
Table 2: PLA vs Trademark vs Non-Trademark 2014 Performance
% Rev 13% 18% 69%
% Cost 23% 58% 13%
ROAS 2.37 1.3 22.0
Conv Rate 2.4% 2.2% 4.7%
AOV $72 $85 $122
Basket Size 1.42 2.74 2.68
CPA $31 $66 $6
CPC $.61 $1.18 $.33
The AOV and basket size findings might surprise some readers! We believe this characteristic is
related to the purchase decision funnel, and where PLAs play in that process. PLAs are matched
based on the product name and description in the advertiser’s product data feed, and therefore
tend to appear on narrower, bottom of the funnel type queries, where the user is looking for a
specific product. PLAs are also probably used more often by consumers executing repeat
purchases of consumable products they use. The last factor we believe that affected AOV and
basket size is the landing page. PLAs by definition have to land the user on a product detail page.
NTM campaigns usually include broader query types that bring consumers to less narrow landing
pages where there is more opportunity to cross-sell or make consumers aware of other products.
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Figure 11 compares PLA campaigns’ share of total AdWords impressions for 2013 and 2014. With
a whopping 71% YOY growth, we’d definitely conclude that this hypothesis is true.
71%
0%
10%
20%
30%
40%
50%
60%
70%
80%
Impression Share
2013
2014
YOY
Figure 13: PLA Impression Share
The law of diminishing returns means that at some point, an incremental investment will reach a
point where the return on that incremental amount fails to perform as well as the investments
preceding it.
A common question we hear from clients and prospects is “how much of my budget should I spend
on PLAs?” In order to assess whether diminishing returns applies to PLAs, we compared PLAs
revenue share to spend share over the 2 year study period. Figure 12 represents that data for our
entire data set over the 2 year period. The datapoints are monthly calculations of revenue and cost
contribution.
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Figure 14: PLA Revenue % vs Cost % 2013-2014
The shape of the trendline seems to indicate that we may not have actually hit the diminishing
returns point yet for PLAs! You can see that there are a few outliers in this dataset. Figure 13
shows this relationship when we removed the 3 most extreme datapoints. The trendline looks quite
different.
Figure 15: PLA Revenue % vs Cost % Outliers Removed
Because of the marked differences we saw in PLAs performance by market segment, we plotted
the revenue % vs cost % for each of our 6 segments to get more precise data for each vertical.
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You can see that in B2B and Hobby markets, the diminishing return concept appears to apply,
while the other 4 segments don’t seem to have hit that point yet, as their curves tend to move up
and to the right. So, what does this mean? We’d recommend that you monitor your own specific ad
spend portfolios to see if for your business PLAs have hit the point of diminishing returns yet.
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Figure 16 highlights what we call the PLA “Sales & Profit Zone” for the Health & Beauty segment.
You’ll notice in the area highlighted by the green bar, the relationship between the investment level
and the return level is almost linear. So, what does this mean for Health & Beauty retailers, or
retailers whose chart looks similar? It means there is untapped sales and profit potential if you
increase your level of investment in PLAs.
Still looking at the Health & Beauty segment example, the dashed lines shows that if an advertiser
was spending 20% of their budget on PLAs, the revenue they get from those ads would be just
under 20% of their paid campaigns’ revenue. In theory, that same company could increase the
percentage up to almost 45% and expect to get a proportional increase in revenue. You can see
the highlighted Sales & Profit Zones for each of our 6 studied segments in Table 3.
Our recommendation for advertisers is to do your own analysis of your PLA/Shopping Campaign
investment and return and determine if the law of diminishing returns applies for your business,
and if you too have untapped sales and profit potential with those campaigns.
Figure 16 PLA Sales & Profit Zone
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Table 3 PLA Sales & Profit Zones by Segment
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We also examined correlation factors in PLAs performance by segment. We examined the
correlation of:
1. The paid search revenue contribution % to paid search cost contribution %
2. ROAS as measured by R/C to the relative investment level as measured by cost
contribution %
3. ROAS as measured by R/C to the absolute investment level as measured in actual $.
Table 4 contains the results of these correlation calculations. Given the shapes of the curves
above, it was not surprising to see Apparel, Home Furnishings and Health & Beauty having very
strong positive correlations between their investment level and revenue contribution. Interestingly,
the B2B sector had a negative correlation, another indicator that B2B firms should keep a close
eye on PLAs performance for diminishing return levels. Also interesting is that we found that there
was only 1 strong positive correlation between the return on spend and the 2 measures of spend
we used, (the cost contribution and the actual amounts invested.) The only positive relationship
we found was in the Health &B segment, between the return metric and the cost contribution. In
that same segment, the correlation between return and actual spend amount was also positive,
although not by such a large margin.
Table 4: PLA Correlation Factors
Correlation Factors gifts apparel hobby home furn h & b B2B
correl rev% to cost % 0.47 0.82 0.43 0.83 0.93 (0.04)
correl r/c to cost % 0.10 (0.46) (0.30) (0.55) 0.60 (0.91)
correl r/c vs spend $ 0.19 (0.45) (0.05) (0.41) 0.31 (0.20)
One hypothesis that we formulated from our data that was not part of our initial predictions is that
perhaps PLA performance is related to the level of engagement customers have with the type of
product being sold. Take another look at the correlation factors of revenue % to cost % in Table 4.
We theorized that product and/or brand affinity can play a huge role in PLA performance since the
3 highest correlation factors are in Apparel, Home Furnishings, and the Health & Beauty, industries
known to have strong product and brand affinities.
Another insight this behavior might show is that highly-considered purchase categories can
perform well as PLAs. Watching my daughter browse hundreds upon hundreds of dress designs
for her prom dress gives me an appreciation for how engaged some apparel shoppers can be!
When it comes to decorating or adding items to your home, that same logic applies. When it
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comes to your health or to your appearance, there are a number of reasons why a customer might
have an affinity for a specific brand or type of product. For example, the “natural” aspect of
mineral-based makeup appeals to users with skin conditions or sensitive skin.
However, the data doesn’t back this theory completely, as one can make the argument that gift
items and hobbies are also high engagement, highly considered purchases, and the correlation in
those sectors, albeit positive, is not quite as strong as the other 3 cited. However, we feel that as
the correlation is still a relatively strong positive one, this is still enough reason for advertisers
selling highly engaged brands or products to think seriously about PLAs as part of their marketing
mix.
One can also view the lack of correlation for B2B businesses as more support for this theory. Most
B2B purchase decisions are made more rationally than B2C decisions, especially when significant
investments are involved. This could mean that the less emotional connection consumers have to
specific brands or products, the lower performance will be for PLA type ads.
One of the most surprising findings in our study was the change in performance that occurred after
the PLA campaign migration to Shopping Campaigns in August 2014. We compared the
performance in our segments from January to July and then from September to December. Table
5 below shows the changes by the key metrics.
Table 5: Performance Change After Shopping Campaign Migration
All Home Furn Apparel Hobby Health Gift b2b
R/C -7% -30% -50% 64% -36% 34% -5%
CPA 11% 64% 125% -39% 66% -25% -7%
CPC 36% 80% 86% -23% 50% 62% 16%
CTR -13% -17% -14% -26% 0% -5% -41%
AOV 3% 15% 13% 0% 7% 0% -12%
Basket Size -6% -7% -6% 25% 6% 4% 12%
To be fair to our friends at Google, the above comparison is not 100% unbiased. Q4 seasonality
and increased competition in PLA auctions in general are probably factors in this dataset. For
example, we have seen what we call “CPC inflation” from increased competition in many of the
markets our clients participate in.
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One of the most frequent questions we hear from advertisers is about determining how incremental
the results are of their marketing investments, especially PLAs. Figures 1 and 2 show that PLAs
often appear on SERPs that have paid text ads as well, so this curiosity makes sense. We tried to
answer this question by first isolating the results of clients in our dataset that had comparable
periods in 2013 and 2014 without any kind of PLA campaign running. For example, if a client did
not have PLAs running from January to March in 2013 from January to March in 2014, we used
that data, along with the results from 2014 when they did have PLAs running to compare their
results. We compared the year-over-year results during the periods when PLAs were not present
to those when they were present in order to deconstruct the growth in the latter period to run-rate
growth, growth from the addition of PLAs and any unexplained growth. We found that the impact
of PLAs appears to be mostly incremental.
Table 6 shows the results for impressions. Here is how the figures break down: For the periods in
2013 when there were no PLAs running in both 2013 and 2014, there were 21MM impressions.
The growth rate for impressions in 2014 for those periods was 8%. For the 2014 period when
PLAs were running, we would expect the run-rate baseline projections from the other campaigns in
those accounts to reach the 22.9MM impressions in the explained growth (the run-rate row of the
After PLA column). We found that the After PLA period in 2014 actually had 32MM impressions,
an additional ~10MM impressions over what the run-rate growth would predict. We found that
about 5.9MM of these impressions are from the PLA campaigns, while the remaining 3.2MM are
from unexplained factors.
In theory, if PLAs were 100% cannibalistic, you would expect the unexplained growth figure to be a
negative number.
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When you look at clicks, you see the same pattern with a positive 20k in unexplained click growth.
Table 6: PLA Incremental Impressions
Impressions Before PLA After PLA
explained growth - run rate 21,173,871 22,906,825
unexplained growth 0 3,230,477
PLA actual 0 5,879,371
Total Actual 21,173,871 32,016,673
Table 7: PLA Incremental Clicks
Impressions Before PLA After PLA
explained growth 363,152 330,212
unexplained growth
20,379
PLA actual
87,955
Total Actual 363,152 438,546
From this analysis, it appears that PLAs are producing incremental impression and traffic growth.
So what does all of this data mean for advertisers? Here are the series of questions that you
should be asking about your own PLA campaigns to decide what your next move should be.
What role do PLAs play in my marketing strategy?
What is the LTV of the customers I acquire via Shopping Campaigns?
How much can I afford to pay for Shopping Campaign Conversions?
How varied are the AOVs coming from my Shopping Campaigns?
How does my PLA performance compare to my non-trademark performance?
Is there room to improve my PLA performance? Are we operating in our own PLA Sales &
Profit Zone?
Am I following known best practices for Shopping Campaigns?
Am I a retailer that sells a lot of 3rd party brands with high demand or consumer preference?
Do the items I sell lend themselves better to visual ads vs textual ads?
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The first decision to make regarding your PLAs (or just if you should start using them) should be on
what role PLAs will play in your marketing strategy mix. For example, are PLAs a new customer
acquisition strategy? If you think yes, then your PLA objectives should consider the LTV impact of
those new customers, i.e. how much additional revenue and margin will those customers deliver
beyond their first transaction. For example, when I used to manage an online ecommerce
business, I knew that repeat purchase rate was over 80% for the company, and that the average
value of the 2nd purchase was almost 3x as high as those first purchases! Knowing this, we
adjusted our CPA and ROAS targets accordingly for campaigns that delivered a high percentage
of new customers. On the other hand, if you find that PLAs tend to bring you mostly repeat
customers, you’ll probably want to ensure each individual transaction meets your profitability
metrics on their own.
Managing marketing budgets is a portfolio management process where you attempt to optimize
your results by managing the relative weights of different investments. Therefore, it is important to
understand how your PLAs performance compares to your other marketing investments, and within
paid search, how it compares to the other elements in your paid search program (such as NTM,
TM, Remarketing, Display and Dynamic ads.) Our study indicates that the balance between PLAs
and NTM campaigns will most likely be the most important aspect of these optimization efforts.
As our examination of the law of diminishing returns for PLAs showed, figuring out how to improve
your PLAs performance depends a lot on the dynamics in your specific industry. To begin solving
this for your business, you should be examining whether or not you have entered your “PLA Sales
& Profit Zone” or not by looking at the relationship between your investment in PLAs and the return
you are getting. We have presented several methods for assessing that question.
In addition to determining whether or not you are in your own PLA Sales & Profit Zone, you should
also ensure that you are following the best practices with your PLA campaigns to improve their
performance.
Some of the key questions to ask yourself with respect to best practices are:
Have we done our SEO for PLAs? Have we optimized our title and description fields in
order to optimize our query matching, click through rates and conversion rates?
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Have we done the search query analysis to identify negative keywords to ensure our PLAs
are showing up in the highest quality auctions as possible?
Have we set up our negative keywords so that we are steering our auctions based on the
purchase decision funnel position of user queries?
Are we utilizing all of the tools available to optimize our performance? For example, are we
using the benchmark data to optimize our bids? Do you have a promotion feed entry for
every product in your feed?
Are we structuring our campaigns so that we can weight our spend according to the return
expected? Have we adjusted our bid strategies based on the AOV variance we see across
our PLA ad groups?
Are we strategically selecting the products in our product feed?
As the data in our study shows, PLAs contribution can be exceptional in some cases, even 500%
more effective than NTM campaigns! PLA revenue and spend contribution have grown to tangible,
impactful levels, they should be given the strategic focus they deserve.
For More Information
Call NetElixir at 609-356-5112 or visit www.netelixir.com
Follow us on Twitter @NetElixir
For over 10 years, NetElixir has been helping 100’s of online retailers succeed in their search
marketing efforts. Our services cover PPC management, SEO, Product Listing Ads & CSEs,
Mobile Advertising, Social Media Marketing, Web Analytics and Google Analytics Consulting.
NetElixir University is our complimentary educational program that provides businesses with
proven strategies and analytical tools for running successful search marketing campaigns.
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Through webinars, workshops and data-driven whitepapers, our goal is to train 10,000 businesses
on the best practices of search marketing.
© NetElixir 2015 All Rights Reserved
NTM & TM –Non-trademark and trademark. At NetElixir, we delineate between campaigns
targeting queries that contain the advertiser’s trademarked terms vs campaigns targeting queries
containing 3rd party brand name terms that the advertiser sells. For example, if the advertiser was
Wal-Mart, any campaigns targeting queries containing Wal-mart, Walmart.com or variants thereof
would be categorized as a trademark or TM campaign. Wal-mart’s campaigns targeting terms like
Tide, Crest, Colgate, Tropicana or any of the other brands it carries would be categorized as non-
trademark or NTM campaigns. For retailers who are vertically integrated, i.e. they sell their own
brands of products like the UP brand at Target stores, or manufacturers that are selling direct to
consumers such as Lenovo, Dell, HP, etc., in this study we have included campaigns aimed at
product-oriented queries containing their trademarks in the TM segment.
CPC – cost per click
CPA – cost per acquisition
ROAS or R/C – Return on Ad Spend. In this report we have used the simple version of dividing
revenue by cost (Transaction Revenue / Advertising Costs)
AOV – Average order value = Total Transaction Revenue / Total # of Transactions
Basket Size - # of line items or skus per order = Quantity / Unique Purchases
Revenue Contribution – in this paper, we use this term to describe the share of Paid Search
revenue that PLA/Shopping Campaigns produced. Again, since we are only using data from
AdWords, this is the percentage of AdWords driven revenue that PLA/Shopping Campaigns
delivered for the stated period.
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Spend or Cost Contribution - in this paper, we use this term to describe the share of Paid Search
media expenses that PLA/Shopping Campaigns consumed. This is the percentage of AdWords
expenses that PLA/Shopping Campaigns consumed for the stated period.
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