Understanding console.log() within functions vs. using return in JavaScript?

I’m learning about functions in JavaScript and I’m confused about the role of console.log() and return.

function reusableFunction() {
  console.log("Hi World");
}

reusableFunction(); 

I understand this function logs “Hi World” to the console. My questions are:

1. Why doesn’t this function need a return statement? I’ve seen other functions that are used return to send values back. Is console.log() doing something similar?

2. Why do we call the function with just reusableFunction(); instead of console.log(reusableFunction());? When would I use the second way of calling the function?

I’m trying to understand the fundamental difference between displaying something in the console console.log() and returning a value from a function. Can you explain this with clear examples and perhaps point me to some resources for further learning?

I tried reading Documents like MDN, JS, and Google Developer Docs. I even did a Google Search and kept getting the basics. It answered my question. I just simply want to know when you know to use a return statement in your functions and when to console.log() and then call the function, like this console.log(reusableFunction()) . I understand what console.log() is what the return statement is and the difference between both.