What is the ruling on allowing website visitors—non-Muslims—to rate commercial establishments, whether critically or favorably, and what are the conditions for accepting and publishing their critiques?

There is no objection to creating a website for evaluating commercial stores and their services, provided that the criticism is truthful, free from lies or slander, and that the aim is to advise the consumer, with the condition that one speaks only about what is known. A Muslim is required to be truthful with both Muslims and non-Muslims.