Technically speaking, a body pillow is a pillow that is smaller than your body. However, that doesn’t do us any good because that is the definition of almost all pillows. In reality, a body pillow is a long pillow that you can use to snuggle up next to when you sleep.
Or body pillows may be smaller and can be placed between your legs or by your side to help give you support in these areas when you sleep.
Sometimes it is just plain comforting to be able to snuggle up next to a soft cushion when you go to bed. Not to mention how much of a better nights sleep you will get as well.