Yy was a term in online literature that was often used to describe fictional worlds, characters, or plots. In web novels, fantasy was often used to enhance the readers 'interest and make them more immersed in the story. For example, a novel could be called " Full Time Expert Yy " because it described the growth story of a professional esports player, or a novel could be called " Otherworld Yy " because it depicted a different world full of magic and adventure. Yy was a popular online literary term that was often used to describe fictional worlds and plots.