1. Obtain explicit user consent before using Advertising ID — refusal must not restrict app functionality; 2. Never collect Advertising ID from children under 13 (even with parental consent); 3. Integrate Google User Messaging Platform (UMP) SDK for consent flow; 4. Verify all ad network SDKs comply with the latest Advertising ID policy; 5. For analytics-only use, consider Firebase Analytics first-party data solutions instead.