According to the fictional universe first established by Slayer, the 'Buffyverse,' The term 'Buffyverse' is used amongst fans of Buffy / Angel online to describe the fictional universe established by Buffy / Angel.
In the 'Buffyverse,'  made by Slayer, the term 'Buffyverse' is used by fans of Buffy / Angel online to describe the universe created by Buffy / Angel.