Is M.2 the same as NVMe?

Excuse me, could you please clarify something for me? I've been hearing a lot about M.2 and NVMe in the context of solid-state drives and I'm a bit confused about the difference. Are M.2 and NVMe essentially the same thing, or are they two separate technologies that work together or independently? I understand that M.2 is a form factor, but I'm not entirely sure how NVMe fits into the picture. Could you explain the relationship between the two and how they impact the performance of SSDs? Thank you.