> ## Documentation Index
> Fetch the complete documentation index at: https://docs.apyconnect.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Segments

> Dynamic contact lists that build and update themselves.

A **segment** is a list of contacts that meet certain conditions —for example, “customers with the VIP tag” or “contacts from Bogotá”—. You don't build it by hand: it **updates itself** as your contacts change.

## What they're for

<CardGroup cols={2}>
  <Card title="Find groups" icon="filter">
    Filter your base by the criteria that matter to you.
  </Card>

  <Card title="Target campaigns" icon="megaphone">
    Use a segment as the audience of a [campaign](/en/guias/campanas).
  </Card>
</CardGroup>

<Note>
  Unlike an imported list (which is fixed), a segment changes automatically when a contact starts or stops meeting its conditions.
</Note>