Behavioral advertising is online advertising based on your history of online activity. For example, if you visit an online shoe vendor, as you travel around the Internet, you might notice ads from that vendor appearing on unrelated, third party sites. This “trick” is accomplished by small cookie files that are stored on your computer by your browser. To opt-out of behavioral advertising (often called “remarketing”) the National Advertising Initiative provides a resource where you can see which advertising networks have placed cookies on your computer, and gives you the opportunity to opt out of seeing any more targeted ads from those ad networks.