A retargeting ad in affiliate marketing is a way to show ads to people who have visited your site but didn't buy anything. It's like a gentle reminder of what they were looking at. When someone leaves your site, a cookie tracks them, and later, when they're on other websites or social media, they see ads for the products they viewed. This can help bring them back to complete a purchase. Retargeting ads can be really effective because they target people who already showed interest in your products. What are your thoughts on using retargeting ads in affiliate marketing?