There's a few, I love this firepit.
One, it’s great if you’re being tracked and you need keep a low profile.
The last thing you need in that case is a roaring fire. I’ll show you how to be practically untraceable from the moment you start digging to the moment you fill it in and carry on your way.
Secondly, it’s great for prolong survival situations where calorie expenditure is a concern.
You can build these right in your shelter, and they require minimal fuel. Meaning a handful of twigs and sticks can get this thing going very well.
Third, it burns very hot. Making it a great way to boil water, or cook meat.
Check out the video for the full tutorial