The Buffyverse is the shared universe of the television shows Buffy the Vampire Slayer and Angel, and its expanded content consisting of comics, video games, novels, and more.
The canonical comic series continuations include:
There have also been several dubious cannon series, including Buffy the Vampire Slayer (1998) and Angel (1999) and alternate universe series, including Buffy the Vampire Slayer (2019), Angel (2019), Angel + Spike, Buffy the Last Vampire Slayer, and The Vampire Slayer.
In the Buffyverse there are an assortment of creatures that live among humans, such as Vampires, Ghosts, Zombies, and several types of Demons.
In each generation is born a Slayer, a woman chosen to gain extraordinary abilities to fight the forces of darkness.
When one Slayer dies, the next slayer in the line is called and gains the powers.
Vampires were once humans who were killed by vampires and then fed some of their blood. Vampires are soulless demons who maintain the original person's memories. There have been vampires who have regained their soul, Angel and Spike.
There are several different types of demons in the Buffyverse. Most demons are hybrids, like vampires, as the full-blooded demons, known as Old Ones are extinct.