Adsense Explaination

Google AdSense is also a way for site owners to
provide Google search capability to visitors and to earn
even more money by putting Google ads on the search
results pages. Google AdSense gives you the ability to
earn advertising revenue from every single page on your
website with a minimal investment of your time
So what kind of ads do you have to put up?
That is the good part you don't have to decide.
Google does it for you. AdSense always delivers relevant ads that are
precisely targeted on a page-by-page basis for the
content that people find on your site.
For example, if you have a page that tells the story of your pet fish, Google
will send you ads for that site that are for pet stores, fish food,
fish bowls, aquariums or whatever you get the picture.