What is what does it mean when someone calls you sunshine?

When someone calls you "sunshine," it generally means that they think you are a bright, positive force in their life. It is often used as a term of endearment or affection to show that person how much they mean to them. It can also be used to refer to someone who has a cheerful disposition or a contagious energy that brightens up a room. Overall, being called "sunshine" is a compliment that implies you bring warmth and joy to those around you.