# Syncs


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A **sync** is the connection between a saved audience and a destination.

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You can connect a single audience to **multiple destinations**, each with its own field mapping and refresh cadence.
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{{< image src="images/audiences/destinations/audiences-workflow-syncs.svg" alt="How Syncs work" width="80%" class="mx-auto d-block" >}}

## Video walkthrough

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## How syncs work

1. Create the audience in the [Audience Builder]({{< ref "audiences/audience-builder/create-audience.md" >}}).
2. Click **Add sync** to connect the audience to a destination.

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3. Configure field mappings — specify which audience columns map to the destination's expected fields.

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Each destination has its own connection and field mapping settings. See the [destination-specific documentation](#supported-destinations) for more information.
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4. Set a sync schedule — each destination connected to an audience can have its own schedule.
5. Run the sync manually on demand, or wait for the next scheduled run. 

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On the first run, a **full sync** sends the complete current membership to the destination. On subsequent runs, audience membership is recalculated against the latest warehouse data and only changes are sent.
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## Supported destinations

- [Braze Audiences]({{< ref "audiences/syncs/braze-audience.md" >}})
- [Facebook Custom Audience]({{< ref "audiences/syncs/facebook-custom-audience.md" >}})
- [Google Ads Remarketing Lists]({{< ref "audiences/syncs/google-ads-remarketing-lists.md" >}})
- [Iterable Audience]({{< ref "audiences/syncs/iterable-audience.md" >}})
- [LinkedIn Audience]({{< ref "audiences/syncs/linkedin-audience.md" >}})
- [TikTok Audiences]({{< ref "audiences/syncs/tiktok-audiences.md" >}})
- [Custom Audience]({{< ref "audiences/syncs/custom-audience/" >}})

## See also

- [How to Create an Audience from a Data Graph]({{< ref "audiences/audience-builder/create-audience.md" >}}): Create and manage audiences in RudderStack
- [Data Graph]({{< ref "audiences/data-graph/" >}}): The entity mapping layer that powers audiences