What do likes and dislikes on reviews do?

They help the most useful reviews rise to the top: reviews open sorted by Most helpful reviews, which counts them. The number of likes is shown; dislikes are counted but never shown, and nobody can see who gave either. You can take back your like or dislike at any time. A creator’s replies to reviews of their own AI character carry a Creator badge, and anyone can report a review that breaks the rules.