Pita bread has the distinction of being the sandwich-maker's best friend. The baking process produces an ingenious cavity that's sealed around the edges. It's perfect for stuffing. If you've ever paid a nasty dry cleaning bill because your sandwich decided to deconstruct itself all over your best suit coat, the advantages of pocket bread, another term for a pita, should be obvious.
Careful, though. There are leavened and unleavened pita breads, so check the label or the recipe to know what you're getting.
The secret to creating traditional pita bread is high heat during the cooking process that produces a super-fast burst of steam inside the dough. The steam forms a hollow and the rest is, well, lunch.