Adsense is all about generating revenue by the simple clicking of the advertisements.
Advertisements, if you don't know, are the links displayed on the websites that makes money for it.
For example
These ads are shown almost on every website and are the main source of their earnings.
You may have heard about the story of the Facebook. The creator of this website, Mark Zucherberg, started this website as a social network where he invested money to develope it. But, see he is now a billionaire. How do you suppose he made this much money. Ads Ads Ads.
Every time someone clicks those ads, the owner of the website or a weblog receives money from the advertiser. Its all simple!
So to have a start with adsense, you need to have a website that may need some initial investment or you can make a weblog or just blog which is actually free to make.
This website or blog, is needed to make an adsense account. without them you can not have an adsense account. because there would be no point in having one.
