It's called retargeting and this is done through cookies on your website. Retargeting essentially is a service that advertisers use to drive you back to their website. They assume since you actively searched for something, that you are still interested if you left the website and you probably left because you were distracted.
Creepy, right?
The Google AdWords system allows you do this, and it's called Remarketing. In fact, DaniWeb does it, by advertising to website visitors who found us through Google search results in the hopes that they will return and join the community. The DaniWeb ads don't necessarily have to be on an IT-based website, since cookies are used to know that they were recently on DaniWeb.
cscgal
The Queen of DaniWeb
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