Google needs deal this due to flights away from its cloud.
It can't compete with Azure for simple/coarse-grained services and AWS for complex/fine-grained services.
Atm, Google cloud is only good for cheap high-ram one-run-centric compute (AWS is cheaper for generic compute and reserved compute), simple container execution (Cloud Run), and ~100 TB bulk storage.
Your phrasing seems off. Why does Meta care what Google needs? It would seem that it's exactly backwards. Meta needs this because training resources are scarce. And Google is in the enviable position of having TPUs.
https://www.youtube.com/watch?v=ue-1JoJQaEg
Fascinating (and insanely impressive) to see how a bunch of switches and stepper motors implement complex logic.