Many people are familiar with google adsense,but…
When marketing on the Internet, the sooner your ad is displayed to your prospect, the greater your chance of making a sale. This is the reason why search engine traffic performs so well. Most surfers initiate their Internet activity at a search engine. Indeed, many have a search engine like Google, Yahoo, or MSN set as their home page. In other words, it is the first thing they see when they log onto the Internet.
Lets take a closer look at the chain of events. A surfer logs onto the Internet because she wants to find something. She goes to Google and enters her search and among the results she sees your ad. It catches her attention and she clicks through to your site. Since you are offering exactly what she is looking for, she is turned into a customer and you make a sale. This scenario happened the way it did because we understand the virtues of targeted traffic, but it also happened because we were the first to satisfy the surfer’s needs.
Now, say the surfer has been online for some time and has been surfing from one site to another, looking around and possibly doing research. This surfer may be frustrated because she has not found what she wants, and is therefore in a negative mindset. What is more likely, however, is that this surfer has turned into a window shopper. Either way, since this surfer has been online for some time now, the result is she will be harder to convert into a sale. » Read more: Google’s Content Network