There was a time when people were not being aware of the money that could be generated with ads. The money is generated when the webmasters and publishers realized how Adsense could be that generator. In those days, the content was the most important factor, it still is. Along with the money they can generate, of course. To know why Adsense is essential for your content site is to know first how it works The concept is really simple, if you think about it. The publisher or webmaster inserts a java script code in a website.
Each time the page is accessed, the java code will pull advertisements from the Adsense program. The ads that are targeted should be related to the content found on the web page where the ad. If a visitor clicks on an advertisement, the webmaster where the ad earns a portion of the money that the advertiser is paying the search engine per click. The search engine is the one who handles all the tracking and payments, providing easy way for webmasters to display content-sensitive and targeted ads without having all the work to seek advertisers, collect funds, monitor the clicks and statistics which could be time consuming. It seems that there is never a shortage of advertisers in the program which obtains the form of Adsense ads. Also webmasters are less concerned about the lack of information that search engines are providing and are more focused on making money from search engines. The first reason why Adsense is essential for content sites is because it has already traveled a long way in understanding the needs of advertisers and webmasters.