If you need the  audience_id
        for any reason, such as to send transactional push notifications to a specific audience,
        follow these steps. 
        - 
                Navigate to Audiences.
            
- 
                Select the Actions menu.
            
- 
                Click Export to CSV.
                A .CSV file downloads. 
- 
                Open the file. Click OK through any error
                    messages.
            
- 
                Locate the name of the Audience you want to target in column B. The audience_id
                    for that audience is to its left, in column A.