I'd say both, don't make the rich richer

Does turning it off stop the data collection, or just stop them from using it to show you targeted ads?

Thank you! The following negativity isn’t directed at you in any way, because this is very helpful (for now).

But something that annoys me about apple is they like, move settings around constantly and change the names of settings. So if you’re having some issue, guides like this with specific detailed instructions end up outdated and lead to dead ends, and not even the search function helps. Almost every issue I have I end up having to look up a second guide on how to find the modern location for whatever toggle I need lol

And this is part of why I root.

Only certain apps get network access, and only certain apps get to use Google services.

They'll complain, some won't work.

Next phone won't have Google services at all, and untrustworthy apps will be sandboxed in their own profiles.

Nor does it cut into the corporate revenues. They get paid for the ads either way. The odds of you clicking an ad (presumably) go down, though, so the click-through revenue the company would hypothetically get if you clicked on ads will be theoretically diminished assuming you believe the big tech companies aren't lying about that data to their advertisers as well.

Apple IDFA

It limits the use of a unique device id that can be shared with third parties. AFAIK it doesn’t limit anything for Apple’s 1st party apps that include advertising, like Maps.

Notably Apple is spinning up a demand side platform (DSP) where advertisers can spend money directly on Apple platforms to place ads. That almost certainly means that platform will have full access to relevant user data for their ads customers.

At this point they're shafting the advertisers. They may not be personalized ads to you, but the advertisers don't know control where their ads show up. They just pay whenever their ads get displayed.

Apple/Google still make the money regardless of "personalized" ads. They still group these users based on some data points like IP location and trends in those areas.

These company's worth didn't grow to trillions without profiting off on both ends. Malicious compliance is the name of the game.

It was a bit more involved than "advertisements". It was a targeted psyop. Cfr Cambridge Analytica.

Absolutely, notifications are so annoying. Phone and texts are all I want to make a sound. Everything else can wait for me to interact

If they cared less you wouldn’t even get the option

Allegedly.