Retargeting is one of the most common and useful ways to use Google Display Ads. Essentially, it involves targeting ads at potential customers who have visited your website before. Most people leave a site without completing a purchase.
That’s where retargeting comes in. Once they leave your site, you can re-market to them elsewhere on the web – whether it’s Facebook or one of their favourite sites. You then stand a better chance of driving them back to your site and converting them into a customer.
Another benefit is that, in addition to winning over new customers, you can promote new products/services to existing customers.