I use it whenever I need to blow stuff up, in any situation. I usually use it on multiplayer servers to be honest. But if I need to clear out a HUGE area, I use it to speed up the process, and clean up the mess if it doensn't blow up in the right fashion.
USUALLYin the nether around an area I don't want zombie pigmen to appear. Otherwise, not often, it can get a bit out of control if you don't use it wisely.
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Pretty much this, I like collecting all the ores and things and blowing stuff up can destroy a lot of ores even if it's just coal and iron.
Like my brothers redstone.
click on my eggs
OR YOU WILL DIE
I AM one of those men.