From social media platforms and email providers to online stores and personal services, you and your details are major commodities. Mostly with little regard for your privacy. Advertisers and marketers donât know who you are. But your behavior is tracked and assigned a unique identifier, called a Mobile Advertising ID (or MAID). This tiny snippet of information contains where you live, what you shop for or what you recently searched online. Until recently, there had been very little that you could do to block your MAID in marketing campaigns. Apple somewhat put a stop to this by allowing iOS users to choose who can target them. But for criminals, if they can match the ID with a person, they stand to profit greatly.