What is when a guy says you look nice?

When a guy says you look nice, it typically means that he thinks you are physically or visually appealing in some way. However, depending on the context and his tone of voice, it could also signify a genuine compliment that he appreciates your appearance and style. It might be an indication of attraction or admiration towards you. It could also be a polite gesture that he makes to show his respect and appreciation for you. However, it is essential to note that someone's intentions may differ depending on the situation and the individual. Therefore, it is always best to judge their actions and words based on your intuition and understanding of the relationship between you and the person.