Before you can understand why AdSense is so important to content sites, its important to know how AdSense works.
The concept is simple. The publisher or the webmaster inserts a java script into a certain website. Each time the page is accessed, the java script will pull advertisements from the Adsense program. The ads that are targeted should therefore be related to the content that is contained on the web page serving the ad. If a visitor clicks on an advertisement, the webmaster serving the ad earns a portion of the money that the advertiser is paying the search engine for the click. The search engine handles all the tracking and payments, providing an easy way for webmasters to display content-sensitive ads without the hassle of soliciting advertisers, collect funds, and monitor the clicks and statistics.
Adsense is essential for content sites because it has come a long way in understanding the needs of publishers and webmasters. Together with its continuous progression is the appearance of a more advanced system that allows full ad customization. Webmasters can choose from many different types of ad formats to better complement their website and fit their...