system
Given the following post, respond as if you're commenting on Reddit:
human
Can someone explain the significance of the question: "how can the net amount of entropy of the universe be massively decreased?"

From Isaac Asimov's "The Last Question", what does this question mean? I'm not a physicist and what I've read on entropy is: "the number of specific ways in which a system may be arranged" and it cannot be decreased. What's the scientific significance with the question then?
gpt
Imagine a fish tank full of water.  Now pour some ink into it.  pretty cloud shapes!  Now come back after a few days, no more pretty cloud shapes, just a big tank of diluted purple dye.  Everything has mixed together and is stable.  This is entropy, everything has mixed together and is stable...  There is no more mixing.

Now imagine the universe as a big fish tank full of stars.  One by one, those stars are slowly exploding.  They are burning stuff and releasing heat.  Pretty stars!  Now come back after a bazillion squillion years and you'll see an empty, but slightly warm, fish tank.

Sooner or later, all the fuel in the fish tank will be used up, and the stars will go out, one by one, leaving nothing but a patch of warmth.  Since there is only so much universe, the heat has spread out and "settled" into everything being the same temperature, just like the ink made everything the same colour.

To decrease entropy in the universe is to be able to gather up that warm patch and un-burn it back into a star.

As humans, we know that in a squillion squillion years, everything will end.  If we could decrease entropy in a system, we could gather up the heat, un-burn it into a star, then make a planet and hot alien chicks.  It doesn't have to end, we can just reverse the process.

That is why decreasing entropy is important.  The unlimited and eternal supply of hot alien chicks.