Behavioral retargeting (also known as behavioral remarketing, or simply, retargeting) is a form of online targeted advertising by which online advertising is targeted to consumers based on their previous Internet actions, in situations where these actions did not result in a sale or conversion.

Retargeting marks or tags online users who visit a certain brand website with a pixel or a cookie, and then serves banner ads only to the people who have shown at least some amount of engagement with the original brand. Retargeting ad campaigns usually run on lower cost media, such as display ads, which not only increases effectiveness by specifically targeting an interested audience, but also improves the overall ROI of the advertiser.

retargeting
Personalized retargeting, a related practice, differs from behavioral retargeting in that it allows an advertiser to display a banner created on-the-fly for a particular consumer based on their specific browsing behaviour. For example, if a consumer visits an advertiser’s website and browses products A, B and C – they will then be retargeted with a display banner featuring the exact products A, B and C that they previously viewed. This is typically restricted to the visitor’s browsing on a single website.