What are custom fields?
A field is what holds the information a subscriber enters into a signup form.
There are nine default fields that exist in MailerLite when you create an account: Name, Last name, Email, Phone, Company, Country, State, City, and Zip.
Custom Fields are fields that you create in addition to these default fields. You’ll need to create a custom field if you want to gather additional information about your subscribers. You can use the additional information to further manage your subscribers and personalize your campaigns.
Learn more with our guide: How to create and use custom fields