What is a custom field, and why should I use it?

Summary of the custom fields in Letterhead and how they may be used.

The purpose of the custom field is to store specific information about your subscribers or audience members.  The idea behind this feature is not only for our users to create segments based on this information, like you do now with tags, but also to use this information for specific merge tags or automations in the future.

You can now create a custom field to store a subscriber's birthday, for example, or any information you think is valuable for you to know about your audience.