I'm not a developer, and wading through the https://developers.facebook.com/docs/graph-api/reference/v2.5/ drives me crazy.
So... I just need a API call with the posts, impressions, likes,... to show the client how well their content performs. I came up (with chat help from Natalia) with this one:

https://graph.facebook.com/v2.5/{facebookPageID}/posts/?fields=insights.metric(post_story_adds,post_impressions_unique),message,link,shares,likes

What are your favourite API facebook queries (Or Twitter, or...)