Apple’s long-awaited crackdown is being enforced. Starting today (April 26), people will start receiving prompts on their Apple devices as to whether they want to be tracked by various apps. Now comes the hard part: while no one can say with any certainty how this will shake it out, it’s clear that mobile advertising won’t be the same once it does.

Source: It’s here! The winners and losers of Apple’s seismic privacy change