Your Apple ID is how Apple defines who you are as their customer and allows them to connect you across all your Apple devices. In other words, it’s your Apple account that holds all your app downloads, iCloud backups, storage, purchases, etc.
First, open your settings app (tip, you can swipe down from the middle of your screen to open the search. Then search for settings).
Your Apple ID & General Info About Your Account & Device Will Be Listed at the Top. Tap To Open It.
Next, tap the text that says, “Name. Phone Numbers, Email”
There you will see your Apple ID listed there. Please note: we do not recommend editing your Apple ID. If you do, we recommend backing everything up and calling Apple for assistance. If done incorrectly, you might lose access to purchases and data stored to a particular Apple ID.