we are planning to create batch to upload mobile id to customer match audience regularly ,so i have 2 question
1. seems like we cannot upload ios and android mobile id to same audience, correct?
2. When we create audience with uploadKeyType to MOBILE_ADVERTISING it's required us to provide appId as well
so, what's the purpose of appId here? if it's just to distinguish for IOS and ANDROID, can i use same appId for different audience?