Lada Hrbacek said
5 months, 2 weeks ago: Hi Andrea,
what do you want to track with Google Analytics? Facebook Page, or a custom application / tab pinned to a page? 
I suppose you mean a Facebook Tab, because you can not track a Facebook Page with Analytics, you have to use Insights.
If you want to add Google Analytics to a tab, then the process will be different for each tool in which you can create custom tabs. Can you please share the URL to the tab, so I can look at it? 
Or you can check the “Reach” section of Insights. There are numbers of visits to your Timeline and tabs. (it’s the last section on the bottom)
Lada
@andreea-nica