Question

An advertiser wants to target people on the search network who have previously visited their website. what should they do?

Answer 1

The advertiser must list down the email address of all the visitors.Then he must email them about his business.He must keep contacting after a month or two.
Best way could be if he asks every website visitor to fill up a form to get a detailed information about the customers.He must further ask if they would be interested in buying his product or not.Then only serious customers would be added.

Answer 2

The answer to this question is:

They should create re marketing lists for search ads

The reason behind is:

Re marketing records for search advertisements (RLSA) is an element that gives you a chance to modify your promotions campaigns for individuals who have beforehand visited your site, and tailor your offers and promotions to these guests when they're seeking on Google and search accomplice or partnership websites.

Re marketing lists for search promotions (RLSA) is a component that gives you a chance to alter your search advertisements battle for individuals who have beforehand visited your website, and tailor your offers and advertisements to these guests when they're looking on Google and hunt partner websites.