How do I earn money with AdSense?

The main way is To displaying Google ads on your Blog or website.With AdSense for content, these ads you display on your site can be either

* cost-per-click (CPC) and
* cost-per-thousand-impression (CPM) ads.

For CPC ads, you'll generate earnings when your users click on the ads. For CPM ads, you'll generate earnings every time the ad appears to a user viewing your site.
You can also generate earnings while enabling your users to search your site and the web.

More External links:

What is Google AdSense
How do I earn money with AdSense?
What is AdSense for search?
How do I earn with AdSense for search?
What is AdSense for content?
How much does AdSense cost?
How much will I earn through this Google AdSense