Audiences
An audience is a named list of contacts — the recipients of your broadcasts. Newsletter subscribers, customers, beta users: one audience each.
Contacts
Each contact stores:
| Field | Type | Description |
|---|---|---|
| emailrequired | string | The address. Unique within an audience. |
| first_name | string | Available as {{first_name}} in broadcasts. |
| last_name | string | Available as {{last_name}}. |
| unsubscribed | boolean | Unsubscribed contacts are skipped by every broadcast. |
Unsubscribes are automatic
Every broadcast email carries an unsubscribe link and a List-Unsubscribe header. When a contact clicks it, their unsubscribed flag flips immediately — nothing for you to build.
Properties, segments, and topics
Each contact can carry custom properties (key/value JSON, edited inline on the audience page) that work as {{placeholders}} in broadcast content. Segments are saved filters over an audience — by contact fields or properties.<key> — that a broadcast can target instead of the whole list; membership is evaluated at send time. Topics (managed at the bottom of the Audiences page) are preference groups: tag a broadcast with one and its unsubscribe link opts the contact out of just that topic, keeping them subscribed to everything else.