add section on device id

Author: tcgilbert

src/connections/destinations/catalog/actions-braze-cohorts/index.md

@@ -60,4 +60,11 @@ Event payloads sent via Computed Traits and Audiences will only contain the comp
 
 When dealing with event payloads transmitted through Computed Traits and Audiences, it's important to note that these payloads typically include only the specific computed trait or audience key in question in addition to user identities such as `userId` and `anonymousId`, as well as `email` if available, [for more information, see here](/docs/engage/using-engage-data/#event-destinations).
 
-If your requirements involve including additional fields from user profiles into your mappings, you can achieve this by leveraging an [Insert Function](/docs/connections/functions/insert-functions/) in conjunction with the [Engage Profile API](docs/unify/profile-api/). With the Profile API, you can retrieve the traits associated with a user from your Engage space within your insert function code, all before the event reaches the Braze Cohorts destination. 
+If your requirements involve including additional fields from user profiles into your mappings, you can achieve this by leveraging an [Insert Function](/docs/connections/functions/insert-functions/) in conjunction with the [Engage Profile API](docs/unify/profile-api/). With the Profile API, you can retrieve the traits associated with a user from your Engage space within your insert function code, all before the event reaches the Braze Cohorts destination. 
+
+### Braze Device ID
+
+If you would like to use the `Device ID` mapping for the Cohort Destination you will need to ensure you have captured the Braze device_id which is not the same as the Segment device_id. Braze has some methods (linked below) that customers can use to capture the Braze device_id for use in the above workaround:
+- [Swift method](https://braze-inc.github.io/braze-swift-sdk/documentation/brazekit/braze/deviceid/)
+- [Android method](https://braze-inc.github.io/braze-android-sdk/kdoc/braze-android-sdk/com.braze/-i-braze/device-id.html)
+- [Web method](https://js.appboycdn.com/web-sdk/latest/doc/modules/braze.html#getdeviceid)