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What is IDFA - Definition & Updates idfa IDFA stands for Identifier for Advertisers, which is a unique ID assigned by Apple to a user's device Android has its own identifier version called Android idfa Surviving and Thriving in a Post-IDFA World A Resource Center for Advertisers and Publishers

idfa The IDFA is important because it makes it possible to identify the same device and user across different apps with 100% accuracy This helps advertisers