Compare reviews on Steam to reviews on Airbnb. You'll quickly notice something, Steam shows you far more information at a glance. You get to know whether someone bought the game themselves or if it was given free to them, how many hours they played before the review, how many hours they played in total, their rating, how other people feel about that review, how many other products the user has, if the review was edited, and of course review text.

Airbnb's reviews has a scoring system that was generalized, and review text, maybe a translation badge if the review was translated.

Reviews work best when you are given as much information as possible. Without it, you might as well be relying on an anonymous 5 star system.