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http://en.wikipedia.org/wiki/AdSense

This article may be written like an advertisement. Please help improve it by rewriting promotional content from a neutral point of view and removing any inappropriate external links. (June 2011)

Google AdSense
Developer(s) Google Inc.
Initial release June 18, 2003[1]
Operating system Cross-platform (web-based application)
Type Online advertising
Website www.google.com/adsense


Google AdSense which is a program run by Google Inc. allows publishers in the Google Network of content sites to automatically serve text, image, video, and rich media adverts that are targeted to site content and audience. These adverts are administered, sorted, and maintained by Google, and they can generate revenue on either a per-click or per-impression basis. Google beta tested a cost-per-action service, but discontinued it in October 2008 in favor of a DoubleClick offering (also owned by Google).[2] In Q1 2011, Google earned US$2.34 billion ($9.36 billion annualized), or 28% of total revenue, through AdSense.[3]Contents [hide]
1 Overview
2 History
3 Types
3.1 AdSense for Feeds
3.2 AdSense for search
3.3 AdSense for mobile content
3.4 AdSense for domains
3.5 AdSense for video
4 XHTML compatibility
5 How AdSense works
6 Abuse
7 Criticism
8 See also
9 References
10 External links

[edit]



Overview This section needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (September 2010)
Google uses its Internet search technology to serve advertisements based on website content, the user's geographical location, and other factors. Those wanting to advertise with Google's targeted advertisement system may enroll through Google AdWords. AdSense has become a popular company in creating and placing banner advertisements on a website, because the advertisements are less intrusive than most banners, and the content of the advertisements is often relevant to the website.

Many websites use AdSense to monetize their content; it is the most popular advertising network. AdSense has been particularly important for delivering advertising revenue to small websites that do not have the resources for developing advertising sales programs and sales people to generate revenue with. To fill a website with advertisements that are relevant to the topics discussed, webmasters place a brief HTML code on the websites' pages. Websites that are content-rich have been very successful with this advertising program, as noted in a number of publisher case studies on the AdSense website. AdSense publishers may only place three ad units per page.

Some webmasters put significant effort into maximizing their own AdSense income. They do this in three ways:[citation needed]
They use a wide range of traffic-generating techniques, including but not limited to online advertising.
They build valuable content on their websites that attracts AdSense advertisements, which pay out the most when they are clicked.
They use text content on their websites that encourages visitors to click on advertisements. Note that Google prohibits webmasters from using phrases like "Click on my AdSense ads" to increase click rates. The 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. AdSense commands an advertiser to submit a sealed bid (i.e., a bid not observable by competitors). Additionally, for any given click received, advertisers only pay one bid increment above the second-highest bid. Google currently shares 68% of revenue generated by AdSense with content network partners, and 51% of revenue generated by AdSense with AdSense for Search partners.[4]
[edit]
History


Oingo, Inc., a privately held company located in Los Angeles, was started in 1998 by Gilad Elbaz and Adam Weissman. Oingo developed a proprietary search algorithm that was based on word meanings and built upon an underlying lexicon called WordNet, which was developed over the previous 15 years by researchers at Princeton University, led by George Miller.[5]

Oingo changed its name to Applied Semantics in 2001,[6] which was later acquired by Google in April 2003 for US$102 million.[7]

In 2009, Google AdSense announced that it would now be offering new features, including the ability to "enable multiple networks to display ads".
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Types
[edit]
AdSense for Feed
s

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."[8]

AdSense for Feeds works by inserting images into a feed. When the image is displayed by a RSS reader or Web browser, Google writes the advertising content into the image that it returns. The advertisement 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 website in the same way as regular AdSense advertisements.

AdSense for Feeds remained in its beta state until August 15, 2008, when it became available to all AdSense users.
[edit]
AdSense for search


A companion to the regular AdSense program, AdSense for search, allows website owners to place Google Custom Search boxes on their websites. When a user searches the Internet or the website with the search box, Google shares 51% of the advertising revenue it makes from those searches with the website owner.[4] However the publisher is paid only if the advertisements on the page are clicked; AdSense does not pay publishers for regular searches. Web publishers have reported that they also pay a range from $0.64 to $0.88 per click.
[edit]
AdSense for mobile content


AdSense for mobile content allows publishers to generate earnings from their mobile websites using targeted Google advertisements. Just like AdSense for content, Google matches advertisements to the content of a website — in this case, a mobile website. Instead of traditional JavaScript code, technologies such as PHP, ASP and others are used.
[edit]
AdSense for domains

AdSense for domains allows advertisements to be placed on domain names that have not been developed. This offers domain name owners a way to monetize domain names that are otherwise dormant or not in use. AdSense for domains is currently being offered to all AdSense publishers, but it wasn't always available to all.

On December 12, 2008, TechCrunch reported that AdSense for Domains is available for all US publishers.[9]
[edit]
AdSense for video

AdSense for video allows publishers with video content to generate revenue using ad placements from Google's extensive Advertising network including popular YouTube videos.[10]
[edit]
XHTML compatibility

As of September 2007, the HTML code for the AdSense search box does not validate as XHTML, as it does not follow modern principles of website design:
Non-standard end tags, such as </img> and </input>
The attribute checked rather than checked="checked"
Presentational attributes other than id, class, or style — for example, bgcolor and align
A table structure for purely presentational (i.e., non-tabular) purposes1
The font tag2


1: using a table structure for unintended purposes is strongly discouraged by the W3C,[11] but nevertheless does not cause a document to fail validation — there is currently no algorithmic method of determining whether a table is used "correctly" (for displaying tabular data or for displaying elements, that get proportionally wider or narrower when browser window resizes in width without active client side scripting).
2: the font tag is deprecated but does not fail validation in any XHTML standard[citation needed].

Additionally, the AdSense advertisement units use the JavaScript method document.write(), which does not work correctly when rendered with the application/xhtml+xml MIME type. The units also use the iframe HTML tag, which is not validated correctly with the XHTML 1.0 Strict or XHTML 1.0 Transitional DOCTYPEs.

The terms of the AdSense program forbid its affiliates from modifying the code, thus preventing these participants from having valid XHTML websites.

However, a workaround has been found by creating a separate HTML webpage containing only the AdSense advertisement units, and then importing this page into an XHTML webpage with an object tag.[12] This workaround appears to be accepted by Google.[13]
[edit]
How AdSense works
The webmaster inserts the AdSense JavaScript code into a webpage.
Each time this page is visited, the JavaScript code uses inlined JSON
to display content fetched from Google's servers.
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, advertisements are served for those keywords based on the AdWords bidding system. (More details are described in the AdSense patent.)
For site-targeted advertisements, the advertiser chooses the page(s) on which to display advertisements, and pays based on cost per mille (CPM), or the price advertisers choose to pay for every thousand advertisements displayed.[14][15]
For referrals, Google adds money to the advertiser's account when visitors either download the referred software or subscribe to the referred service.[16] The referral program was retired in August 2008.[17]
Search advertisements are added to the list of results after the visitor performs a search.
Because the JavaScript is sent to the Web browser when the page is requested, it is possible for other website owners to copy the JavaScript code into their own webpages. To protect against this type of fraud, AdSense customers can specify the pages on which advertisements should be shown. AdSense then ignores clicks from pages other than those specified.
[edit]
Abuse

Some webmasters create websites tailored to lure searchers from Google and other engines onto their AdSense website to make money from clicks. Such websites often contain nothing but a large amount of interconnected, automated content (e.g., a directory with content from the Open Directory Project, or scraper websites 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 websites use content from other websites, such as Wikipedia, to attract visitors. These and related approaches are considered to be search engine spam and can be reported to Google.[citation needed]

A Made for AdSense (MFA) website or webpage has little or no content, but is filled with advertisements so that users have no choice but to click on advertisements. Such pages were tolerated in the past, but due to complaints, Google now disables such accounts.

There have also been reports of Trojan horses engineered to produce counterfeit Google advertisements that are formatted looking like legitimate ones. The Trojan uploads itself onto an unsuspecting user's computer through a webpage and then replaces the original advertisements with its own set of malicious advertisements.[18]
[edit]
Criticism

According to critics, Adsense is one of the worst publisher programs who really don't care about it's publishers. Many cases were reported about the accounts being disabled once a publisher reaches the minimum payout amount of $100. Publishers will only get an automated email which says that your site is a threat to the advertisers and other publishers, but you will not be provided with any proof or solution. The email only contain a link to the help forum which will not give the account reinstated even if your account is disabled in error. About 99%[citation needed] affected publishers says that their account is not reinstated, and they confirms that it is done in error. Critics accuses Adsense as the only publisher program with discrimination based on country and caste for it's publishers. There are numerous complaints reported about the difference in treatment a publisher is getting from Asia against one from US.[19] Due to alleged 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 advertisements to drive up the other company's costs.[20]

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

The payment terms for webmasters have also been criticized.[21] Google withholds payment until an account reaches US$100,[22] but many micro content providers[citation needed] require a long time—years in some cases—to build up this much AdSense revenue. However, Google will pay all earned revenue greater than US$10 when an AdSense account is closed and not disabled.

Many website owners complain that their AdSense accounts have been disabled just before they were supposed to receive their first paycheck from Google. Google claims accounts have been disabled due to click fraud or forbidden content, but have offered no proof of this. An automated email is sent to the publisher's owner which offers no reasoning, or options but a link to file an appeal. In the email, Google states that "Because we have a responsibility to protect our AdWords advertisers from inflated costs due to invalid activity, we've found it necessary to disable your AdSense account. Your outstanding balance and Google's share of the revenue will both be fully refunded back to the affected advertisers." The revenue generated - whether legitimate or not - is taken, and all complaints are deferred.[23]

Google came under fire when the official Google AdSense Blog showcased the French video website Imineo.com. This website violated Google's AdSense Program Policies by displaying AdSense alongside sexually explicit material. Typically, websites displaying AdSense have been banned from showing such content.[24] Some sites have been banned for distributing copyrighted material even when they hold the copyright themselves or are authorized by the copyright holder to distribute the material.[25][not in citation given]

It has been reported that using both AdSense and AdWords may cause a website to pay Google a commission when the website advertises itself.[26]

In some cases, AdSense displays inappropriate or offensive ads. For example, in a news story about a terrorist attack in India, an advert was generated for a (presumably non-existent) educational qualification in terrorism.[27]

AdSense uses tracking cookies that are viewed by some users as a threat to privacy.[28] Webmasters that use AdSense must place the appropriate warning in the privacy policy page.[29]
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See also
The AdSense Code (book)
Google AdWords
List of Google products
Pay per play
Scraper website
[edit]
References
^ Google Expands Advertising Monetization Program for Websites, June 18, 2003, Press Release, Google
^ What happened to the pay-per-action beta?
^ "Google Announces First Quarter 2011 Financial Results". Google. Retrieved May 10, 2011.
^ a b "Google Form 10-Q, Q2 2010". 2010-07-15. Retrieved 2010-09-08.
^ Paula J. Hane (1999-12-20). "Beyond Keyword Searching". Info Today.
^ "Google Buys Applied Semantics". Incisive Interactive Marketing LLC. 2003-04-24.
^ "Google Acquires Applied Semantics". Press release. 2003-04-23.
^ Shuman Ghosemajumder (2005-05-17). "Official Google Blog: Feed me". Retrieved 2007-12-29.
^ AdSense For Domains Now Available For All US Publishers, Robin Wauters, Dec 12, 2008, TechCrunch
^ Brian Womack (2010-05-03). "Google’s YouTube Boosts Display Advertisers 10-Fold (Update1)". Bloomberg Businessweek. Retrieved 2010-05-03.
^ W3C. "Tables". Retrieved 2009-10-06.
^ Stu Nicholls. "Adding AdSense to application/xhtml+xml pages". Retrieved 2008-02-02.
^ Roger Johansson (2004-09-01). "Content negotiation, AdSense, and comments". Retrieved 2008-02-02.
^ "Google AdSense Help Center: What are CPM ads?". 2007-12-29.
^ "Google AdWords: All About Site-Targeted Ads". 2007-12-29.
^ "Google AdSense Help Center: What is the referrals feature?". 2007-12-29.
^ "Google yanks AdSense referral program, offers shoddy surrogate". blog.anta.net. 2008-07-01. ISSN 1797-1993. Retrieved 2008-07-01.
^ Benaifer Jah (2005-12-27). "Trojan Horse program that targets Google AdSense ads". TechShout.
^ "Adsense discrimination". Retrieved 7 December 2011.
^ Charles C. Mann (January 2006). "How click fraud could swallow the internet". Wired.
^ Lem Bingley (2007-02-01). "Google keeps on coining it in". IT Week.
^ "When do I get paid?". Google AdSense Help Center.
^ "Disabled Account FAQ - AdSense Help". 2010-11-08.
^ "Adult content". Google AdSense Help Center.
^ "Google AdSense Program Policies". 2007-12-29.
^ "BE CAREFUL when using both AdSense + AdWords by Google". 2009-02-19.
^ "Google's Worst Ads Ever (GOOG)". 2009-08-20.
^ Criticism of AdSense cookies
^ Google AdSense terms
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External links
Google AdSense

Google AdSense patent application
Inside AdSense — Google's official weblog on AdSense[show]
v · d · e
Google Inc.


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