Q: how do I find my me ID? What do I use it for?

Hello 3greatscholars,

Thank you for the question.  Your Apple ID is usually your email address.  If you are unsure if you have an Apple ID, use the following steps to look it up:

An Apple ID is your username for everything you do with Apple: shopping the iTunes store, signing in to iCloud, buying an app, using iMessage, and more. That's why it's best to use a single Apple ID and not forget it. Using multiple Apple IDs might be confusing and may cause issues with accessing purchased content or using some services.

If you can't remember your Apple ID, follow these steps to look for it:

1. Go to My Apple ID (appleid.apple.com) and click “Find your Apple ID”.
2. Enter your first name, last name, current email address, and any prior email addresses that you might have used to create an Apple ID. Apple uses this information to search for Apple IDs.
   • If no Apple IDs are found, follow the onscreen instructions to create an Apple ID.
   • If one Apple ID is found, choose whether to receive an email from Apple or answer security questions. Both options will conclude by asking you to reset your Apple ID password. Follow the instructions provided.
   • If multiple Apple IDs are found, select the one that matches your current email address. Then choose whether to receive an email from Apple or answer security questions. Both options will conclude by asking you to reset your Apple ID password. Follow the instructions provided.

Apple ID: How to find your Apple ID

http://support.apple.com/kb/HT5625

Additionally, you can use this article if you find the Apple ID but forgot the password:

Apple ID: If you forget your password

http://support.apple.com/kb/HT5787

Find more information about where you can use an Apple ID at the following link:

Where can I use my Apple ID?

http://support.apple.com/kb/HT5616

Thank you for using Apple Support Communities.

Best,

Sheila M.