I'm going to ask the same question here: If I run a Facebook ad campaign for my app and given that Apple already provides the SKAdNetwork attribution mechanism, does enabling IDFA benefit my app, or it benefits only Facebook? Marketing people are trying to convince me IDFA is important for ad efficiency and thus should be enabled (with the spooky ATT popup in the beginning), but something is telling me it's not. I mi…
More generally, if you want to be able to track your own users and where they come from, it matters.
If all of your traffic is organic, then it's irrelevant.