What is payment by SWIFT?

Could you please explain what payment by SWIFT entails? I've heard it mentioned in the context of international finance and cryptocurrency transactions, but I'm not entirely clear on its specifics. Is it a type of digital payment system? How does it work, and what are its advantages and disadvantages compared to other payment methods? Additionally, how does SWIFT payment relate to the world of cryptocurrency, and are there any limitations or challenges associated with using it for crypto transactions?