The advertising of the past, but also (hopefully) the future.
It's how traditional advertising works. Advertisers place ads based on audience-level profiles of users, not individual-level profiles of users.
The audience-level profiles either come from common sense ("I bet people commuting to midtown east have lots of disposable income to spend on vacations") or based on surveys ("audience research").
Contextual advertising is strictly less creepy than behavioral advertising. The ads will not be targeted based on any data about the person viewing the ads.