When you're browsing meals (menu pages, meal details, the meal-picker for a subscription, etc.), any meal you've ordered before shows clickable star icons instead of plain display-only stars. Click a star (1 through 5) to rate that meal — your rating saves immediately and the stars update to reflect it. You can also rate extras the same way. The business controls whether the numeric average rating and vote count are shown next to the stars, so on some sites you'll only see the stars themselves. Ratings are per meal, not per order, so rating a meal once covers all your past and future orders of that same meal (rating it again just updates your existing rating).