Answer:
Behavioral targeting
Step-by-step explanation:
Behavioral targeting is an advertising technique that provides publishers and advertisers the opportunity to display relevant selling information and ads to users depending on the web-browsing behavior of the users.
Behavioral targeting mostly depends on data that are relevant to the behavior of user like items searched previously, last website visit date, pages viewed, amount of time used on a website, ads, content and buttons clicked, and among others.
Therefore, the tracking of online activity and delivery of ads based on that activity is called behavioral targeting.