Google Display Network Targeting
Monday, October 24th, 2011Background
The Google Display Network (GDN, formerly referred to as the Google Content Network) has an extremely large inventory pool of sites across the internet. GDN was initially launched on October 23, 2000, and in more than a decade has grown to one of the largest online advertising properties in the world. It is estimated that this network reaches 89% of the internet in the U.S., with over 1 million publishers and 211 million unique users per week (comScore Networks machine-based panel). Paid search and display media ads can be served across this network, and audiences can be targeted in several different ways. Ads are served alongside content specified by the advertiser. This brief will take a deep dive into the targeting capabilities of the GDN, and the benefits of the GDN for a paid search advertiser.
GDN and Digital Advertising
Paid search advertising and display media advertising both have the opportunity to advertise within the GDN. The main difference between these two mediums is cost structure. Display media is usually bought on a cost-per-thousand (CPM) basis, meaning the advertiser pays each time 1,000 impressions are served. Thus, each advertiser’s display media impression must be a valuable placement.
Paid search advertising is usually purchased on a cost-per-click (CPC) basis. This means that the advertiser only pays when their ad is clicked on. With this cost structure, there is more flexibility in what sites these ads are placed. If the site is not compatible with the ad, then the ad will not get served and no cost is incurred. Paid search advertising using the GDN is an excellent way for an advertiser to reach a greater audience and still maintain efficiencies.
While targeting is critical for both types of digital advertising to reach the right audience at the right time, the implications of highly specific targeting are usually more essential for display media to ensure that impressions are not lost on an extraneous audience. However, all targeting options in the GDN are available for purchase on a CPM or CPC basis for both text and display ads, depending on the advertiser’s goals.
Types of GDN Targeting
Contextual Targeting - selecting specific keywords and/or topics where the advertiser would like an ad to appear. Contextual targeting is done on the page level, not the site level for maximum relevancy.
Keyword Contextual Targeting – advertisers select certain keywords that are relevant to them, and bid to appear alongside this content. This ad may appear on any site across the GDN where there are those keywords on the page. The scale of this method of advertising could be very large, depending on the keywords that are being targeted. It is usually recommended to layer this type of targeting with another method to increase relevancy and minimize waste.
Topic Contextual Targeting – advertisers select certain topics that are relevant to them, and bid for their ad to appear on pages of these sites. This ad may appear on sites across the GDN that are categorized under that topic. This method is very broad-reaching as well, and is usually recommended in combination with another targeting method for an advertiser interested in reaching a specific audience.
Placement Targeting – advertisers select certain sites and/or sections of sites that are relevant to them, and bid for their ad to appear on pages of these sites. These sites can be selected by the advertiser using Google Tools such as Ad Planner, which uses Nielson data to index sites in the GDN based on:
- Demographics (Household Income, Age, Gender, Education)
- Online Activity (Other Sites Your Audience Visits, Keywords Your Audience Searches For)
- Interest Categories (i.e. Cooking & Recipes, Women’s Interests, Weddings)
In practice, Razorfish usually finds this method to be the most successful approach to the GDN, because sites/sections that index highly against a target market can be cherry-picked for extremely relevant targeting.
Behavior Targeting – Advertisers select certain topics that are relevant to them, and bid for their ad to appear across the GDN to users who match those interests. This method can be used to reach a large audience as well as a more targeted, niche audience. A user’s interests are either declared interests (through the Ad Preferences Manager), or are inferred based on their browsing behavior, specifically their recent and frequent site visits. This method of targeting is usually used for broad-reaching awareness campaigns or advertisers that seek site visitors that abandoned part of an intent funnel.
Inferred Demographic Targeting – advertisers bid on an audience where Google has inferred their demographic based on their GDN history. A user’s demographic is determined by a number of sources, including user registration data, 3rd Party data and site composition. The registration data that is used in Inferred Demographic Targeting may come from YouTube registration, or other undisclosed sites in the GDN that capture registration information. Specific targeting sources cannot be cherry-picked, and Google takes all into account when inferring a demographic. The composition index of a site determines the inferred demographic. For example, if a person visits a fashion site, and then visits a parenting site, then Google may infer the demographic as a Female 25-54. If an advertiser uses Inferred Demographic Targeting for this target, then Google will serve an ad in the GDN network to that person. Google is constantly improving the dataset used to determine user Demographics and will incorporate new data sources as they become available. Additionally, this feature is currently in Beta and advertisers must request to be whitelisted by Google to participate.
This newer method of targeting may have benefits for an advertiser that has an extremely specific audience they wish to target, and should be tested alongside other GDN methods. However, because demo-inferred targeting is still in beta and takes very little user self-identification into account, it should not be used exclusively as a preferred GDN targeting method without the support of testing and analysis alongside the other methods.
Below is an example of how an advertiser can use a Google tool, Ad Preferences Manager, to target select audiences.
Remarketing – advertisers bid on an audience that visited their site (or a site which will allow them to implement a pixel) and their ad is displayed across the GDN. This method is often used for CRM marketing, or if the visitor was in the middle of a conversion funnel and then left. In the example given below, Special K can remarket those that visited the Special K Challenge Registration page but did not fulfill registration.
Hybrid GDN Targeting - GDN Targeting products can be combined together to reach a very specific, desired audience. As targeting layers increase, an advertiser will be reaching a more specific audience and a smaller percentage of the total population.
GDN Benefits for Paid Search
With the targeting capabilities and mass reach of GDN, there is a greater opportunity to expand paid search marketing campaigns. Expanding an advertiser’s paid search marketing presence will lead to impactful benefits such as:
1. Efficiencies – It has been established with prior campaign history that paid search is one of the most efficient means of advertising. However, paid search on sponsored search (i.e. Google.com) can sometimes be expensive if an advertiser is bidding on keywords where there are many other competitors, which may increase CPC and overall cost significantly. Including GDN and network targeting can be essential for an advertiser with many competitors who is concerned with efficiencies such as CPC and CPA (cost-per-action).
2. Reach – there are a finite number of searches for a set of keywords, and search trends must increase if an advertiser wants to expand their paid search marketing efforts. GDN offers an opportunity to expand reach beyond basic sponsored search results.
3. Relevancies – GDN is an opportunity for an advertiser to appear alongside relevant content or a target audience efficiently.
4. Testing - GDN is a way test sites and targets with minimal cost commitment (budgets can be set as low as $1 a day for only one day)
5. Turn-Key Implementation – ads are the same format as traditional paid search ads (130 characters) and can be created quicker than other advertising creative.



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