# Sequence and merge tag

> The sequence is the series of emails a campaign sends.

Source: https://warmerly.com/docs/help/glossary/sequence-and-merge-tag

The **sequence** is the series of emails a campaign sends. A **merge tag** (also called a variable), such as `{{firstName}}`, is filled in from each lead's data when the email is sent.

## More from Glossary of Warmerly terms

- [Lead](https://warmerly.com/docs/help/glossary/lead): A person you might email, with their address and company details.
- [Sender](https://warmerly.com/docs/help/glossary/sender): A mailbox chosen to send a campaign. Emails are spread across the senders you pick.
- [Suppression list (shown as "Do not contact")](https://warmerly.com/docs/help/glossary/suppression-list-shown-as-do-not-contact): Addresses Warmerly must never email from your workspace: hard bounces, spam complaints, unsubscribes and…