How to make a rating?

Question

Web development

Please tell me how to rate the site on a 5-point system like in the play market? How can I calculate this correctly? The table will include such data as (rating and comment) the rating will be 1, 2, 3, 4, 5 and how to correctly display the rating as in the play market?

Answer 1

Save everything to the database and aggregate. It can be done on the fly, it can be pre-calculated and stored in the cache. The algorithm can be any at your discretion: from arithmetic mean to any magic