Hecate is the Greek Goddess of a LOT of things. Some include night, light, magic, witchcraft, darkness, necromancy, and more. She is one of my all time favorites, which is why I have her tattooed on my arm!
You may be asking yourself, why 3 heads? If you search Hecate on Google, you will see that most of the time she is depicted with three bodies, or three heads. This is explained differently from different cultures, but the conclusion I have come to is that it translates into the belief that she could see in all directions and also all parts of the timeline; the past, the present and future.
This is why she was also called “the Goddess of Crossroads”. But again, the crossroads seem to have varying meanings depending on who you ask.