Google AdSense is a program run by Google Inc.
that allows publishers in the Google Network of content sites to serve
automatic 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).In Q1 2011, Google earned US$2.43 billion ($9.71 billion annualized), or 28% of total revenue, through Google AdSense.
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:
- 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.
source : wikipedia
