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

# Segments

> Reference documentation for segments in Confidence.

A segment is a definition of a subpopulation, like a certain cohort
of users.

<Note>
  A segment has no targeting key. Use segments with all targeting keys.
</Note>

## Segment Components

Segments consist of:

* **Inclusion criteria**: Filters that describe which users belong to the segment
* **Allocation**: The percentage of users matching the criteria to include
* **Exclusivity**: Optional setting to make segments mutually exclusive

Segments are reusable across multiple flags and experiments, making them a powerful
tool for consistent targeting across your feature flag infrastructure.

## Related Resources

<CardGroup cols={2}>
  <Card title="Create Segments" href="/docs/how-to-guides/create-segments">
    Step-by-step segment creation guide
  </Card>

  <Card title="Audience Reference" href="/docs/flags/audience">
    Configure targeting and allocation
  </Card>

  <Card title="Define Audience Criteria" href="/docs/how-to-guides/define-audience-criteria">
    Add targeting criteria
  </Card>

  <Card title="Launch an A/B Test" href="/docs/quickstarts/launch-abtest">
    Target segments in experiments
  </Card>
</CardGroup>