There are many different uses of the .baby domain name;

• You can use it to keep family updated throughout the beginning of your baby’s life. 
• It’s a great domain for selling goods related to baby’s such as push chairs, cots, high chairs, dummies and many other products for a baby.
• You may run a blog based on dealing with baby care and what some of the best practices are, along with tips for parents when it comes to day to day life.

All of these things help build a loving baby community, helping to keep baby’s happy and healthy.