What do you mean when people say you have no taste?

What do you mean, no taste? For example, I like listening to light music, and you like listening to various domestic online songs and DJ songs. I said you really have no taste, listening to such songs. How to understand this? It means that you are vulgar, too tacky and a little demeaning. ...

However, everyone's hobbies are different. Radish and cabbage have their own tastes, and they have no taste in my eyes.