Supermetrics supports several ways to add the "Destination URL" dimension to a Facebook Ads report. Refer to this table to see which option is right for your query.
When to use
|Existing post destination URL
|Promoted post-type ads that were created from existing posts.
|Promoted post destination URL
|Promoted-post type ads that were created in Facebook Ad Manager.
|Internal destination URL
|Ads that link to a Facebook Page or another internal object.
|External destination URL
|Ads that link to an external webpage.
|Catch-all field; will return the same value as a specific URL dimension.