Custom fields let you store data beyond the built-in details — for example a plan name, account manager, region, signup source, or renewal date.
Define the custom fields your workspace needs, then populate them either during import (by mapping a CSV column to the field) or when editing a contact.
Custom fields aren't just storage — you can use them to build segments and to personalize messages. Insert a custom field as a variable in a campaign, sequence, or broadcast, and each recipient sees their own value. Consistent custom-field data is what makes targeted, personalized sending possible.