What is what does it mean when a guy says you look good?

When a guy says you look good, it typically means that he thinks you appear attractive, well put-together, and possibly even sexy. However, the extent of his meaning can vary depending on the context and relationship between the two individuals. In some cases, it might simply be a compliment or a polite greeting, while in others it could be a more flirtatious or romantic indication of interest. Ultimately, the meaning of the comment will depend on the specific situation and the individuals involved.