A virtuoso is an incredibly talented musician. You can also be a virtuoso in non-musical fields.
A politician who helps pass a lot of bills might be called a legislative virtuoso. A baseball player who hits a lot of home runs is a slugging virtuoso. Usually, this word applies to music. It's very common for a talented pianist or guitarist to be called a virtuoso. Whatever your talent, it's a huge compliment to be called a virtuoso.