Google uses its 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 one of the popular programs that specialize in creating and placing banner advertisements on a website or blog because the advertisements are less intrusive and the content of the advertisements is often relevant to the website. Many websites, use AdSense to make revenue from their web content (website, online videos, online audio content, etc.), and 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 salespeople to seek out advertisers. To display contextually relevant advertisements on a website, webmasters place a brief Javascript code on the website's 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. Google has removed the policy of limiting AdSense ads to three ads per page. Now, Adsense publishers can place an unlimited amount of AdSense ads on a page.
Some webmasters put significant effort into maximizing their own AdSense income. They do this in three ways:
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 (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. On June 18, 2015, Google announced rebranding of AdSense with a new logo