An email address is a unique identifier used to send and receive messages over the internet. It typically consists of two main parts: the username and the domain name, separated by the "@" symbol. For example, in the email address "example@gmail.com," "example" is the username, and "gmail.com" is the domain. Email addresses are essential for communication in both personal and professional settings. To create an email address, individuals usually sign up with an email service provider like Gmail, Yahoo, or Outlook. Once registered, users can access their inbox to read, send, and organize messages. Email addresses also allow for the sharing of files and links, making them a vital tool for online communication.