Google adsense is a vast ads network. Who produce their publishers google ads code to view them into your website. Those people can join the google adsense program who have an owned blog or website or domain. You can earn very much from this google adsense. It will depend on the types of ads. If the ads is expensive then you will get more money when the site viewer clicks on the ads of your site. If the ads is cheap then you will get less money when your site viewer clicks on the ads of your site.
Google adsense also give you the chance of search engine. You can get the search engine code and paste that in you web site to view your search engine and add the google adsense ads in the search engine. When the site viewers search any keyword then you will get revenu.
Google adsense is the best way of earning money from internet.
Just follow the steps in my blog then if you are updated to the terms and services of the google adsense then you will get a free google adsense account. You can get access to you google adsense account and start earning money. It's registration is free.