Introducing third-party ads on the Google content network

The Google content network now accepts display ads served from qualified third-party vendors. Third-party ad serving has been a longstanding request from top brand AdWords advertisers who use third parties to create and manage their online campaigns. Initially, we will be only accepting third-party ads in English, but we hope to expand to other languages soon.

Making the Google content network more accessible to large brand advertisers also benefits AdSense publishers and end users. Third-party ad serving will introduce a greater variety of advertising into the Google content network, increase the inventory of quality display ads competing to show on AdSense publisher sites, and offer more engaging ads for end users. In the long run, we believe the increased inventory and ad competition will result in increased revenue for many AdSense publishers.

Rest assured that ad quality on the content network will remain one of our highest priorities. Only advertisers with whom we have proven relationships and who've clearly demonstrated commitments to our quality standards may participate in this program. And our policies governing ad content and formatting are unchanged.

How to control third-party ads shown on your site
The same ad management features for Google ads also apply to third-party ads. You can use the Ad Review Center to filter specific placement-targeted ads from appearing on your site. To block contextually-targeted ads from a given advertiser, you can use the Competitive Ad Filter. (The Ad Review Center currently only shows placement-targeted ads, not contextually-targeted ads.)

Optimizing your site to allow third-party ads
To allow third-party ads on your site:

1. Opt into image ads - Currently, third-party ads are only available in image or Flash, so they won't appear in text-only ad units.

2. Enable advertisers to target your AdSense channels - Most advertisers who use third-party ads are brand-conscious. They prefer to specify websites where their ads will appear in order to optimize the targeting and effectiveness of their campaigns.

3. Opt into placement targeting - Placement targeting will allow advertisers to target their ads specifically to your site.

Following these steps will enable your site to accept third-party ads. However, we can't guarantee where or when third-party ads will appear on your site.

Want to learn more about third-party ads? Visit our FAQ.

Google AdSense

Google AdSense is an ad serving program run by Google. Website owners can enroll in this program to enable text, image and, more recently, video advertisements on their sites. These ads are administered by Google and generate revenue on either a per-click or per-thousand-impressions basis. Google is also currently beta-testing a cost-per-action based service.

Overview
Google uses its search technology to serve ads based on website content, the user's geographical location, and other factors. Those wanting to advertise with Google's targeted ad system may sign up through AdWords. AdSense has become a popular method of placing advertising on a website because the ads are less intrusive than most banners, and the content of the ads is often relevant to the website.

Currently, AdSense uses JavaScript code to incorporate the advertisements into a participating site. If it is included on a site which has not yet been crawled by the Mediabot, it will temporarily display advertisements for charitable causes known as public service announcements (PSAs). (The Mediabot is a separate crawler from the Googlebot that maintains Google's search index.)

Many sites use AdSense to monetize their content. AdSense has been particularly important for delivering advertising revenue to small sites that do not have the resources for developing advertising sales programs and salespeople. To fill a site with ads that are relevant to the topics discussed, webmasters implement a brief script on the sites' pages. Sites that are content rich have been very successful with this advertising program, as noted in a number of publisher case studies on the AdSense site.

Some webmasters work hard to maximize their own AdSense income. They do this in three ways:

1. They use a wide range of traffic generating techniques including but not limited to online advertising.
2. They build valuable content on their sites which attracts AdSense ads which pay out the most when they get clicked.
3. They use copy on their websites that encourage clicks on ads. Note that Google prohibits people from using phrases like "Click on my AdSense ads" to increase click rates. Phrases accepted are "Sponsored Links" and "Advertisements".

The source of all AdSense income is the AdWords program which in turn has a complex pricing model based on a Vickrey second price auction, in that it commands an advertiser to submit a sealed bid (not observable by competitors). Additionally, for any given click received, advertisers only pay one bid increment above the second-highest bid.

History
The underlying technology behind AdSense was derived originally from WordNet, Simpli (a company started by the founder of Wordnet, George A. Miller) and a number of professors and graduate students from Brown University, including James A. Anderson, Jeff Stibel and Steve Reiss.A variation of this technology utilizing Wordnet was developed by Oingo, a small search engine company based in Santa Monica founded in 1998. Oingo changed its name to Applied Semantics in 2001,which was then bought by Google for $102 million in April 2003.

AdSense for feeds
In May 2005, Google announced a limited-participation beta version of AdSense for feeds, a version of AdSense that runs on RSS and Atom feeds that have more than 100 active subscribers. According to the Official Google Blog, "advertisers have their ads placed in the most appropriate feed articles; publishers are paid for their original content; readers see relevant advertising — and in the long run, more quality feeds to choose from".

AdSense for feeds works by inserting images into a feed. When the image is displayed by the reader/browser, Google writes the ad content into the image that it returns. The ad content is chosen based on the content of the feed surrounding the image. When the user clicks the image, he or she is redirected to the advertiser's site in the same way as regular AdSense ads.

AdSense for feeds has remained in its beta state ever since its original announcement. Only selected AdSense users have been allowed to sign up for it, and no more users are being admitted to the program.

AdSense for search
A companion to the regular AdSense program, AdSense for search lets website owners place Google search boxes on their pages. When a user searches the web or the site with the search box, Google shares any ad revenue it makes from those searches with the site owner. However the publisher is paid only if the ads on the page are clicked: Adsense does not pay publishers for mere searches.

AdSense for Mobile Content
AdSense for mobile content allows publishers to generate earnings from their mobile webpages using targeted Google ads. Just like AdSense for content, with AdSense for mobile content Google matches ads to the content of your site -- in this case, your mobile website.

How AdSense works
* In order to put ads on a web page, the webmaster inserts JavaScript code into the page.
* Each time a page with an AdSense tag is visited, the JavaScript creates an iframe and sets its "src" attribute to the page's URL.
* For contextual advertisements, Google's servers use a cache of the page to determine a set of high-value keywords. If keywords have been cached already, ads are served for those keywords based on the AdWords bidding system. More details are described in the AdSense patent.
* For site-targeted ads, the advertiser chooses the page(s) to display ads on and pays based on CPM (cost-per-thousand-impressions, or the price advertisers choose to pay for every thousand ads displayed).
* For referrals, Google adds money to the advertiser's account when visitors either download the referred software or subscribe to the referred service.
* Search ads are added to the list of results after a user performs a search.
* Since the JavaScript is sent to the web browser when the page is requested, it is possible for other site owners to copy the JavaScript into their own web pages. To protect against this type of fraud, AdSense customers can specify the pages on which ads should be shown. AdSense then ignores clicks from pages other than those specified.

Abuse
Some webmasters create sites tailored to lure searchers from Google and other engines onto their AdSense site to make money from clicks. These "zombie" sites often contain nothing but a large amount of interconnected, automated content (e.g.: A directory with content from the Open Directory Project, or scraper sites relying on RSS feeds for content). Possibly the most popular form of such "AdSense farms" are splogs ("spam blogs"), which are centered around known high-paying keywords. Many of these sites use content from other web sites, such as Wikipedia, to attract visitors. These and related approaches are considered to be search engine spam and can be reported to Google.

MFA (Made For AdSense) is a site or page with little or no content, but filled with advertisements so users have no choice but to click on ads. Such pages were tolerated in the past, but due to complaints Google now disables such accounts.

There have also been reports of Trojans engineered to produce fake Google ads that are formatted to look like legitimate ones. The Trojan Horse apparently downloads itself onto an unsuspecting computer through a web page and then replaces the original ads with its own set of malicious ads.

Criticism
Due to concerns about click fraud, Google AdSense has been criticized by some search engine optimization firms as a large source of what Google calls "invalid clicks" in which one company clicks on a rival's search engine ads to drive up its costs.[14] Some publishers that have been blocked by Google complain that little justification or transparency was provided. Webmasters who publish AdSense can receive a lifelong ban without justification.[citation needed] Google claims they cannot "disclose any specific details" on fraudulent clicks since it may reveal the nature of their proprietary click-fraud monitoring system.

To help prevent click-fraud, AdSense publishers can choose from a number of click-tracking programs. These programs will display detailed information about the visitors who click on the AdSense advertisements. Publishers can use this to determine if they have been a victim of click-fraud or not. There are a number of commercial tracking scripts available for purchase.

The payment terms for webmasters have also been criticized.Google withholds payment until an account reaches US$100,but many small content providers require a long time – years in many cases – to build up this much AdSense revenue. These pending payments are recorded on Google's balance sheet as "accrued revenue share".[18] At the close of its 2006 fiscal year, the sum of all these small debts amounted to a little over $370 million, cash that Google is able to invest but which effectively belongs to webmasters. However, Google will pay all earned revenue greater than $10 when the AdSense account is closed.

Google recently came under fire when the official Google AdSense Blog showcased the French video site Imineo.com. This site clearly violates Google's AdSense Program Policies by displaying AdSense alongside explicit adult content.Typically, sites displaying AdSense have been banned from showing adult content.[citation needed]

In addition, Google has been criticized for claiming that they created, or had a bigger part in creating, AdSense than they really did. Most recently, Gokul Rajaram claiming he was the "godfather" of AdSense caused some controversy.Another Google employee who took credit for AdSense was Susan Wojcicki.