Feature summary (what you would like to be able to do and where):
To prioritize editing, sometimes I use sitelinks as a measure. However, some wikis make extensive use of Wikidata (e.g. cawiki, eswiki, ruwiki), others much less so (enwiki), or not at all (dewiki). I suppose one could combine the number of sitelinks and check for specific wikis, but frequently uses are in languages I didn't think of initially.

Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):

• Sample query based on sitelinks: query. Finds currently 3, including https://www.wikidata.org/wiki/Q16336479 and https://www.wikidata.org/wiki/Q284744
• Q24022575&action=info#Page_properties finds that the item is used in arz, ru, ro, sv .. meaning information from the main subject of that item is used in these languages (not just labels or sitelinks).

Benefits (why should this be implemented?):
content actually used on Wikipedia can be made available.