The Google AdSense program (and similar programs from other companies) is a contextually based ad system. What does this mean?

It means that Google quickly reads the content of any page that contains its AdSense code, every time someone views that page. Based on that content, Google then supplies ads that are relevant -- in context -- to the page information. A page about dog grooming will show ads about dog grooming, or pet grooming, or perhaps about pets. It won't show ads about iPads or travel to Thailand.

The Google AdSense program is very easy to use, and a simple way to add another income stream to your e-business's bottom line. The AdSense series, beginning with this primer, will help you determine whether AdSense is right for you, and, if it is, help you turn it into a consistent money-maker for your site.

Below are two links to the official Google AdSense site. They'll give you some general information about AdSense. Following that is information to help you to get started with AdSense...