Importance of Baby\’s Sleep Your baby\’s sleep is extremely important for healthy body and brain development. Children undergo a variety of physical, mental, cognitive and language development during sleep. The right amount of sleep can improve the body\’s immunity and reduce the chance of contracting diseases. More importantly, sleep can help the brain operate more efficiently, and memory and learning abilities can be continuously enhanced. One year old is also an important developmental stage in a baby\’s life, so achieving a standard sleep time is crucial to the baby\’s physical and mental health.