What is E-mail?

The "e" in e-mail stands for electronic. "Electronic mail" is a message sent from a user at one computer to a user at another computer.

E-mail is the most popular form of communication on the Internet because it is free, fast, and easy to use.

The person you want to write to does not have to connected to the Internet the same time you are - your message will be waiting for them the next time they check their e-mail.