What can you do with an RPC?

So, I'm curious, what exactly can one do with an RPC, or Remote Procedure Call, in the world of cryptocurrency and finance? I understand it's a way for different software systems to communicate, but how does that translate into practical applications for managing digital assets, trading, or even developing new blockchain-based solutions? Are there specific examples of how RPCs are Leveraged in the industry today, and what benefits do they offer over other methods of inter-system communication?