As a web site owner, here is what Google AdSense offers you:
1 - It is very easy to set up and use - potentially within minutes you can start to earn money from your blog or website.
2 - The more visitors you attract to your web site, the more your AdSense income increases, visits means $$$ Cash
3 - You don't need to bother finding advertisers for your web page - Google sorts all that out, fast and perfectly targeted.
4 - You only need to specify how and where you want the adverts placed on your web page - Google handles the rest.
5- To make life easier, it's tightly integrated into other Google products such as Blogger, MySpace, YouTube, that's right and who´s the owner of those sites, Google Inc.
As an advertiser, here is what Google AdSense offers you:
1 - It's very easy to get up and running.
2- You don't need to bother finding where and how to advertise - Google sorts all that out by placing adverts on relevant web sites on your behalf.
3 - You don't need to look for other similar (relevant) web pages to advertise on - Google handles all that.
4 - You don't pay just because your advert was displayed on someone's web page - you only pay when people click it and come to your web site.
5 - You decide how you want your advert to appear, but Google handles the rest.
6 - You can fix your advertising budget, with 100% certainty that it will deliver targeted visitors to your web site.
