A username is a name a person uses when they are on a computer or on the internet. A username, when used with a password, identifies one specific person. A username is usually used to access some type of personal account.
What Usernames Are For
Usernames are used many places on the internet. Some uses of usernames on the internet include:
signing into an e-mail account
connecting to the online portal where your grades can be seen
signing into your blog
accessing your bank account online
viewing your fantasy football account
ordering something from an online store
Think of other places on the internet where you might have a username.