What is Facebook retargeting?
Have you ever checked out a product on Amazon and then seen it on Facebook later?
Facebook knew that you visited Amazon because Amazon placed a small bit of Facebook code on its site. This lets Amazon automatically show you an ad based on the URL you visited. So even though you didn’t buy the product, Amazon still has a chance to turn you into a customer well after you visit their site.
While Amazon has tens of millions of monthly visitors, this strategy will work for any amount of traffic – even if you only have 100 visitors per month.