It allows you to execute code on another machine. Your code makes a function call that returns a status / error, except the function runs on another node. It's

It allows you to execute code on another machine. Your code makes a function call that returns a status / error, except the function runs on another node. It's another RPC framework and there are more caveats like what guarantees a framework makes. Did the function execute exactly once, at most once or at least once.