1. The role of the baby pacifier. The pacifier is a tool to help the baby soothe his emotions. It can relieve the baby\’s anxiety, incessant crying and other problems. At the same time, using a pacifier can also help babies develop sucking habits and promote oral development. 2. Choose a suitable baby pacifier. When choosing a pacifier, you should consider the following aspects: 1. Material: non-toxic is preferred.