> ## 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.

# Use Exposure Filters

> Learn how to add exposure filters to narrow down which users to include in experiment analysis.

[Exposure filters](../metrics/exposure#exposure-filtering) are methods for narrowing down more closely which users to include in the exposure definition and the analysis of your experiment. When you add an exposure filter, the analysis only includes the exposed users that also match the exposure filter.

<Note>
  You first need to create a [fact table](../metrics/fact-tables) that has information about the exposure criteria before you can use it as an exposure filter.
</Note>

## Add an Exposure Filter

<Steps>
  <Step title="Open the Results menu">
    On the experiment design page, find the **Results** section in the right sidebar. Click the menu button next to the heading.
  </Step>

  <Step title="Select Exposure filters">
    Select **Exposure filters** from the dropdown menu to open the Add exposure filter dialog.
  </Step>

  <Step title="Enter a name">
    Give the exposure filter a descriptive name.
  </Step>

  <Step title="Select fact table">
    Select the exposure filter fact table from the dropdown. This fact table should contain information about when users meet your exposure criteria.
  </Step>

  <Step title="Add filter criteria (optional)">
    Optionally filter rows from the fact table by clicking **Add attribute** or **Add set** to define criteria. For example, if you have multiple page view events in the same fact table, filter to include only views from a specific page.
  </Step>

  <Step title="Click Add">
    Click **Add** to save the exposure filter.
  </Step>
</Steps>

<Note>
  For exposure filtering, you can only select fact tables that have a column of type `Entity` that matches the entity for the experiment.
</Note>

<Tip>
  Exposure filters don't affect who actually gets the experiment experience. The filter only narrows down *who counts* as exposed in your A/B test. To limit who actually sees the experiment, use [inclusion criteria](../experiments/audience#inclusion-criteria) instead.
</Tip>

## View Results with Exposure Filters

Confidence produces metric results for each exposure filter separately. You can:

* Select different exposure filters in the results page to see how results vary
* Click **Detailed results** to see all metrics with and without all exposure filters simultaneously

## Related Resources

<CardGroup cols={2}>
  <Card title="Exposure Reference" href="/docs/metrics/exposure">
    Deep dive into exposure configuration
  </Card>

  <Card title="Create Fact Tables" href="/docs/how-to-guides/create-fact-table">
    Set up exposure filter data sources
  </Card>

  <Card title="Explore Results" href="/docs/how-to-guides/explore-results">
    Analyze results with different filters
  </Card>
</CardGroup>