Showing ads to people who have previously interacted with your brand or website.

Retargeting (also called remarketing) shows ads specifically to people who have visited your website, engaged with your content, or taken certain actions.
Retargeting typically has higher CTR and ROAS than prospecting.
Retargeting brings back people who showed interest in your brand but didn't convert. Since only 2-3% of visitors buy on their first visit, retargeting is how you capture the other 97%. It's typically the most profitable campaign type because you're reaching people who already demonstrated intent through their behavior.