A content-rich site is one that has lots of informative articles up at it, usually centered around a theme. Most sites can not quite pull off being WikiPedia, so they specialize.

For instance, you could do a site for dog owners. Possible articles on that site would cover:

WHERE TO GET A DOG
HOW TO DEAL WITH A PUPPY
DOG TRAINING
WHAT TO FEED DOGS
TAKING YOUR DOG ON A TRIP

And so on......

The articles you will want to have on your site should be short enough so that someone can read them in about 5 minutes. This means you want to stick to articles of 250 to 750 words.

Of course, your real purpose in putting up all these nice little short articles and changing them out frequently is not to just put information out into the world. It is to have a site that people will come back to so that they will see Google AdSense ads, and click on them, and then you will get checks in the mail. That is a key point, so I am going to repeat it:

THE PURPOSE OF HAVING A CONTENT-RICH WEBSITE IS TO ATTRACT PEOPLE TO IT, AGAIN AND AGAIN, SO THAT THEY WILL SEE THE ADS AND CLICK ON THEM.

You might think it is lots of cool graphics and colors that make a site attractive to a visitor, but it is really the content. In order to make money from Google AdSense, you need to grasp that concept.

Believe me, you could run a wonderful advertising campaign and develop all sorts of viral marketing tools and attractive affiliate programs.

But unless your website is content-rich, the traffic spikes that you get for your efforts will only be temporary.

The very best way to attract and retain an online audience is to provide content that is useful, valuable, informative, educational or just downsight funnyas heck or entertaining in some way.

Writing a content-rich website actually has a lot more to it than just this. If you would like to learn more about this and how to increase your income with AdSense you may look up a book called: "BUILDING YOUR OWN ADSENSE EMPIRE". This book can be found at www.AdSenseCrow.com.