Custom fields allow you to add extra information about your contacts to your contact database.
Custom Fields allow you to add extra information about your contacts to your contact database. With custom fields, you can create custom segments from your individual contacts or from your contact database that will dynamically update your content with the values for the individual contact receiving the email. Your custom fields are completely customizable to the use cases and user information that you need.
For more information about Custom Fields, please see our documentation.