What is RPC for dummies?

Sure, here's a questioner's tone simulation based on the given paragraph: "Hey there, I'm a bit of a tech newbie and I've been hearing about this thing called RPC, but I'm having a hard time wrapping my head around it. Can you explain to me in simple terms what RPC stands for and what it's used for? I'm not really into the nitty-gritty details, just the basics. Thanks in advance!