“If you use the iTunes Store, or any other Apple online service such as iCloud, you have an Apple ID,” Kirk McElhearn writes for Macworld.
“This is the email address associated with your Apple account,” McElhearn writes. “I get lots of questions about Apple IDs, and in this week’s column I answer a number of them.”
McElhearn covers the two types of Apple IDs, moving to a different country, sharing content from the same iTunes accounts with different Apple IDs and more in the full article here.