Light weight, flavourful, and densely nutritious, dried foods take a lot less shelf space, and don't require ongoing energy inputs to stay preserved.
Compared to many other food storage options, drying is easy, inexpensive, and can safely store most foods for a long time.
There are healthy and safe ways to dry food, as well as methods and tools to avoid. But the main reason to dry food is the concentrated flavours that can be used in so many delicious ways.
Since this is a how-to cheat-sheet, I don't dive into recipes, but I do share a resource list. Happy food drying!