# Create a segment
1. From the sidebar, select **Audience** > **Lists & segments**.
2. Click **Create new** > **Create segment**.
3. Name your segment.
4. \[Optional] Add a segment description.
5. Use the **'**Segment definition' section to define your audience. Specify which [attributes](https://docs.bird.com/applications/audience/lists-and-segments/quickstarts/broken-reference) and conditions the contacts should match. Start by selecting whether you want the audience to include contacts that match "All" or "Any" of the following attributes/condition groups.
6. Filter contacts by attributes, or by condition groups, which are nested attribute filters. Choose from a range of filtering options, such as "has any value," "is unknown," "equals," and "starts with."
7. Use "and/or" filtering functionality to combine different attributes and conditions.
8. Contacts that match the criteria you have outlined are displayed in the list below. Once you're happy with your audience, click the **Save Segment** button.
{% hint style="success" %}
Your audience has been saved. View it by clicking the **Audience** tab.
{% endhint %}
{% hint style="info" %}
To save time, existing segments can be used as a foundation for building a new segment. Click **New segment** and select an existing segment from the list. This will automatically populate the new segments with the same criteria as the selected foundation.
{% endhint %}
