Circles are groups of reviewers who are experts on a specific topic, in a specific geographic area. Circles allow users to see only the opinions of these expert reviewers in order to highlight the opinion of those experts and facilitate the selection of the restaurant by users. For example, if a user is in Milan he will be able to see all the Circles in the Milan area on various topics and select the one that interests him/her. If the user is interested in the Circle PIZZA in Milan, he/she will only be able to see the opinion of expert pizza reviewers and how they have reviewed the various pizzerias in Milan, having the possibility of seeing the average rating of these reviewers for each venue, as well as that the individual reviews of each of the reviewers.