It is recommended to start using a baby monitor right after welcoming your baby home. A baby monitor is a device that helps you monitor your baby when you are not in the same room. It can be especially useful during the baby's sleeping time or when you need to do other chores in the house. By using a baby monitor, you can have extra peace of mind by being able to hear or see your baby when you are in another room. It can even be especially useful during the night when you may not be in the same room as your baby when you are sleeping. It is important to choose a reliable baby monitor and follow the manufacturer's instructions for use and installation. Be sure to place the baby monitor at a safe distance from the baby to avoid possible danger.