Facebook Granular Tagging
To optimize Facebook at the most granular level, you will need to append your tags with ID's provided within Facebook.
The following instructions will need to be followed for each ad.
1) Navigate to your Ads Manager, find your ad and click on Edit
2) Navigate to "Tracking"
3) Under "URL Parameters" place the following:
&c3ch=Facebook&c3nid={{campaign.id}}-{{adset.id}}-{{ad.id}}