Star ratings are simple, but they have an immense effect. They increase social proof, boost word-of-mouth marketing, and improve the results of paid ads. And, most important, they influence purchases.

It earned a five-star rating for driver safety and a four-star ... Its sharp edges and unique shape have raised concerns about the potential impact on pedestrians in a collision.

Some 92% of consumers say the average star rating on an online store for a mobile app influences their decision to download, according to a recent report from Apptentive. Moreover, 59% of consumers ...