It's not super important because it's already activated and mostly concerns the vamps out there, but anyway: this sigil is for gaining access to the Akashic records of vampire magic directly so that the "modern" vampire magic can work again. After the ancients moved to the astral, the connection broke and the magic which relied basically on their memorized spells being shared over the egregore, broke down.

It was starting to cause chaos in especially the US vampire coteries. It's not insignificant to practice protective ritual magic when you have groups like these, but then you need that magic to also function.