Audience key as trigger condition to avoid event failure.

Author: Panandhan22

src/connections/destinations/catalog/actions-linkedin-audiences/index.md

@@ -34,6 +34,7 @@ To add the LinkedIn Audiences destination:
 8. Once authenticated, input your LinkedIn Ad Account ID from your [LinkedIn Campaign Manager](https://www.linkedin.com/campaignmanager){:target="_blank"} account. Toggle “Enable Destination” on and click  **Save Changes**.
 
 9. Navigate to the **Mappings** tab, click **New Mapping**, and select **Sync To LinkedIn DMP Segment**.
+     * **Note:** Please configure the trigger condition as ("Event Property" "audience_key" "is" "<Audience Key you copied in Step 2>") under **Select events to map and send** column of the mapping.
 
 10. Under Select mappings, input the Audience Key you copied in Step 2 as the “Segment Engage Audience Key.” Do not change any other defaults. Click **Save** and toggle to enable the mapping.
      * **Note:** The Audience Key must be manually entered to ensure users in the Engage Audience are sent to the correct DMP Segment in LinkedIn. For every Engage Audience you want to send to your LinkedIn Ads Account, a separate **Sync To LinkedIn DMP Segment** mapping must be created. You can create up to 50 mappings within an instance of the LinkedIn Audiences destination.