Is it okay to not add the word "model" on the billboard in front of the barber shop?

Yes. The basis of barber shop signboard design is shape. The quality of the shape directly affects the function and aesthetics of the entire facade. It is okay not to add the word shape on the barber shop front billboard. The decision is based on the aesthetics of the shop owner and depends on the person. The barber shop is a place for hair care. It is common to trim the hair to make the appearance clean and tidy, which has the function of beautifying the appearance and beautifying the hair.