One of the most annoying parts of sewing is deciding what to do with all of the seams of the garment. Most store bought items use a serger to finish the edges of the fabric so that they don't fray, however a serging machine can be expensive and most hobby sewers don't want to invest in one. French seams are quite a hassle on occasion and that leaves the best option of pinking shears.
Pinking shears can be used directly on the loose pieces of the fabric seams and create a pretty zig zag effect that prevents fraying. It is not quite as secure as a serger, but it does the trick cheaply, quickly, and easily!