[cm2012]

Every comment here is wrong, which is typical for an advertising related thread on HN. Here's the actual reason:

1) Apple made a change last year (in ios 14.5) that neutered the ability for platforms to track results from mobile advertising.

2) This fucked ad targeting for pretty much everyone that relies on mobile web and apps (fb, tiktok, snap, etc)

3) Products that require good targeting to be profitable became harder to promote (like all b2b advertising, niche needs and hobbies ,etc) so more ads are ones that appeal to the average person, which means more teeth whitening strips, weight loss solutions, etc.