An advertiser wants to target people on the Search Network who have previously visited their website. What should they do?
They should use location targeting
They should use device targeting
They should use placement targeting
They should create remarketing lists for search ads
Remarketing lists for search ads (RLSA) is a feature that lets you customize your search ads campaign for people who have previously visited your site, and tailor your bids and ads to these visitors when they’re searching on Google and search partner sites.
Read more here: https://support.google.com/adwords/answer/2701222