What is username?

A username is a unique identifier used to access an account on a computer system, website, or online service. It is typically a combination of letters, numbers, and/or symbols chosen by the user when they create their account. Usernames are important for securing accounts and protecting personal information, as they provide an additional layer of identity verification. When choosing a username, it is recommended to avoid using personal information or easily guessable names, and to use a strong and unique password to further protect the account.