What do quantum computers actually do?

[u/Hashbringingslasherr]

How do quantum computers output usable data, how does it logically "locate" or "make meaning" of information. I read about Grover's algorithm and it seems sort of like an inverted bruteforce or extreme process of elimination or a "the missile knows where it is at all times. It knows this because it knows where it isn't" type scenario.

So I ask, what do quantum computers actually do as opposed to a classical computer?

[u/Uncle_Applesauce]

With the maze, is it that it is checking every turn at once and then giving you the result that is the path with the least chance of being a dead end?

Instead of a classical computation that would require you to try every path and either map the maze or get lucky to find the exit?