I don’t know how developed this service is in other countries, but when it is about Ukraine, the lack of information is the key point. I mean I see a shop, a cafe or something else on the map - usually I see its address and working hours but I can’t be completely sure it sells what I need and whether it is good or not.
So I try to share practical things, something which makes sense for me. If it is about cafe, it matters, whether the food is tasty and healthy, expensive or not and whether you have to wait it for a long time. If it is about some place of interest or amusement park - it matters whether it is a good place to spend some time with kids, what else is there, how much is the ticket, some common and simple things.