> ## 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.

# Contact lists

> Import audiences from a file and reuse them in your campaigns.

A **list** is a fixed group of contacts that you build yourself —usually by importing them from a file— to use as the audience of a [campaign](/en/guias/campanas).

## Import a list

<Steps>
  <Step title="Upload your file">
    Import a **CSV** file with your contacts (for example, exported from your spreadsheet).
  </Step>

  <Step title="Review the numbers">
    ApyConnect validates the phone numbers to discard invalid ones, keeping your delivery quality high.
  </Step>

  <Step title="Map the columns">
    Indicate which column of your file corresponds to each piece of data (name, phone) and to each **variable** in your template, to personalize the messages.
  </Step>
</Steps>

## List vs. segment

<CardGroup cols={2}>
  <Card title="List" icon="list">
    A **fixed** group that you build or import. It doesn't change on its own.
  </Card>

  <Card title="Segment" icon="filter">
    A **dynamic** group that updates based on conditions. See [Segments](/en/crm/segmentos).
  </Card>
</CardGroup>

<Note>
  Lists are reusable: you import once and use it across several campaigns.
</Note>