It also, consequently, makes the advertisements which they show to you far less valuable. So this feature is not widely advertised.
It also, consequently, makes the advertisements which they show to you far less valuable. So this feature is not widely advertised.
It doesn’t prevent them from collecting anything or building a profile - just from invoking that profile at the time the ad is bid.
They just don’t show you what you look like to them directly all the time.
You still get some personalized ads, just not all of them.