# Peer-initiated invitations campaign

*Marketing*. A [email marketing][] [campaign][] designed to get customers to invite their friends and family.

This campaign should follow all best practices for improving [deliverability][], preventing [spam][], and maintaining your [email reputation][ers].

[email marketing]: /docs/sendgrid/glossary/email-marketing

[campaign]: /docs/sendgrid/glossary/campaigns

[spam]: /docs/sendgrid/glossary/spam

[ers]: /docs/sendgrid/glossary/email-reputation-score

[deliverability]: /docs/sendgrid/glossary/