What is the difference between iAd vs AdServices?

Hi. I'm having a hard time differentiating the iAd and AdServices frameworks. Is there a reason to use one framework over the other?

It appears that AdServices is iOS14+. Is iAd being deprecated?

I also noticed that iAd requires users to explicitly accept App Tracking in order to pull attribution data but AdServices does not. Is that true? Is it the same data?

What is the difference between iAd vs AdServices?
 
 
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