What is RLSA?
Remarketing Lists for Search Advertising (RLSA) is not display remarketing, where image and banner ads follow you around. RLSA is probably better thought of a search remarketing.
Instead of showing banner ads to people who previously visited a website, it allows companies to show text ads alongside search results, but narrowing it down and showing them only to the people who previously visited their website and only when they are searching for those specific products and services. When use correctly, RLSA is a powerful tool for pulling in new business.