# SMS verification glossary

Twenty terms you meet when dealing with verification codes and temporary numbers, defined in one sentence each, with a longer page behind every one.

## What is SMS verification?

SMS verification is the process where a service sends a one-time code by text message to a phone number and asks you to type it back, proving you control that number. It is used at sign-up and as a second factor at login.

Source: https://smsnitro.com/glossary