Nursing pillows are specialty cushions that help raise your baby to the correct height for easy latching. Again, you don't need anything special like this to breastfeed, but I found having a Boppy and My Brest Friend helped immensely in those earliest breastfeeding days. On the bed, I often used just a stack of bed pillows instead, but out in my glider in the living room, I preferred the firmness of a nursing pillow. Using a breastfeeding pillow will help you avoid hunching your back over and bringing your breast to the infant instead of the way you're supposed to do it: Bring the baby to the breast! It's much more comfortable that way, trust me, particularly if you're still recovering from the birth.
Nursing pillows, despite the term, can also be used for bottle feeding, so if that's something you or your co-caregivers would like to do, a pillow can come in handy for that as well.