iPhone Other storage: What is it and how do you clear it?

I'm sure this sounds familiar: You're trying to download and install the latest iOS release, or take some photos, or download that cool app your friend told you about, and your iPhone says the storage is full.You’ve already deleted every app you don’t think you need, and there’s still not enough space. So you look at your iPhone storage in Settings page and, sure enough, your iPhone’s storage is full. Worst of all, a huge chunk of it is just listed as Other. Wh