Ok. Maybe the first question is what is remarketing?
It's a marketing technique that allows you to target users who have previously visited your website/blog with banner ads. You use different marketing channels (like social media, SEO, etc) to bring a visitor to your website, and if they don't make a purchase, you use re-marketing or re-targeting method to bring the visitors back to your website and covert them into a sale.
Take a look at this infographic from quicksprout that explains why is remarketing important for companies? Remarketing campaign strategies, tips and more!
A key tips from Neil Patel is:
If you want to do well through remarketing, make sure your ads are creative. I’ve found that for service-oriented businesses, funny ads or query ads tend to perform the best.