Ah OK.
You will then need to lookup "even tracking". Basically ad an event on each one of the ads links you have on your website. (Surely you use templates and you can do this automatically)
What this does is create an event record (under Behavior tab on Analytics) every time someone clicked on that link. If you label that even correctly, you can then click on that even, and add a secondary dimension to see where did i t come from.
OR
If you're looking at the source (Facebook for example) you can select a goal on the same report that is setup with the event information. This will give you the number of visits from that source, and the number of events (clicks on the ad)
I hope this helps