The Charmed Ones are what exactly?

The Charmed Ones are a trio of powerful witches, usually consisting of three sisters, who use their magical powers to protect innocent lives and vanquish evil. According to the television series Charmed, the Charmed Ones are the most powerful witches of all time, and their powers are derived from the power of three. This means that they are most effective when they are working together and channeling their powers through one another. The Charmed Ones are often protectors of the innocent, and they use their magic to fight demons, warlocks, and other supernatural threats.