Definition of Facebook Retargeting

In a simple term, Facebook retargeting is a type of advertising system that allows you to reach out to those who have once; 

-Visited your website,

-Subscribe to your newsletter or

     -Made a purchase of goods and/or services on your site.

Facebook gives you ‘retargeting audiences’ opportunity based on your list of customers, your website traffic, the activities on your official mobile App, offline events, and customer engagements.