🗂️ Custom Fields: Create Your Own Data

Custom fields let you store anything you want on a subscriber: an affiliate ID, a company name, a t-shirt size, a webinar date. Create a field once and it works across the whole plugin.

Three places to create one:

1. During a CSV import: every column dropdown has an Add A Custom Field option
2. On a signup form: the Fields table has an Add A Custom Field button
3. Automatically via the public signup API: any extra field posted with a signup is stored

Field names are normalized to lowercase letters, numbers and underscores (My Phone becomes my_phone), and every field you create is remembered and offered everywhere from then on.

Four places to use them:

1. In emails: {{my_field}} or {{custom.my_field}}, including inside links
2. In the audience builder: the Custom Field filter matches equals, contains or exists
3. In the AI Segment Builder: the AI knows your field names and uses them when you describe an audience
4. On signup forms: collect the value straight from the visitor

Subscribers can carry any number of custom fields, and values are visible on each subscriber's profile.