Amazon - What is the difference between Reviews vs Ratings
Amazon products have two different metrics for Reviews and Ratings.
Here is a popular product with 1419 Ratings BUT only 259 Reviews.
What are Ratings
Ratings are just "stars" rated by people - they may or may NOT add a review.
A lot of people just rate a product 1 to 5 stars and do not write a detailed review.
What are Reviews
Reviews on the other hand is a detailed review written by a person with a headline and a written review.
See the Amazon new review writing page for the difference