Google AdSense is an advertising program created by search engine Google for the owners of websites that are offered to place relevant or key – word targeted ads on their websites’ pages. In contrast to another Google’s advertising program named AdWords, Adsense is meant for publishers of websites, but not advertisers. The ads to be placed on an AdSense publisher’s website have several options of appearance and quantity which depend on the publisher’s preferences.
In order to become a participant of AdSense advertising program, an interested publisher needs to sign up for the program in the respective section of Google’s official website. In addition, the website where AdSense ads are expected to be placed should fit certain criteria set by the advertising program’s terms of service, while the publisher is also supposed to submit some information to qualify for the program. Nonetheless, as a whole, the process of joining the program is quite simple.

The process for Google AdSense set up is simple. Your first step in becoming an AdSense publisher is to fill out a free online application. In order to qualify you must have a launched site with acceptable content and a valid URL. Acceptable content refers to the information that is included within your site. If there is any information pertaining to violence, racism, pornography, computer hacking, illegal drugs, gambling, profanity or any other content seen as inappropriate by the Google team, the site will be deemed as having unacceptable content and can be refused for AdSense advertising. Another requirement is a valid payee name and mailing address to receive payments.

So – called Cost per Click or CPC principle underlies the method of charging advertisers for AdSense services. The principle means that an advertiser should pay an agreed amount of money every time when his or her ad is clicked by a visitor of the website.
The advertising program is available for almost any website except websites that contain adult material. The program gets more and more popular as it allows websites’ owners to monetize their websites and cover expenses that non – commercial websites might bear.
AdSense is actively used by file - hosting websites. File - hosting service or online file storage service allows uploading and storing large files at its server by individuals or legal entities so that the latter could eventually use the files as they need or share them with others. As file - hosting websites usually offer file - hosting service free of charge, they need to compensate their server maintenance expenses. Therefore, file - hosting websites often apply for participation in AdSense program to get some revenues. Besides, the potential AdSense advertisers are also very interested so that their ads would appear on file - hosting websites as such websites usually enjoy some huge traffic. The huge traffic of file - hosting websites is explained by the fact that the websites attract a lot of people who seek a way to store and share their large files on the Internet for free