Music plays a large part in our society, and in life in general. Music that is upbeat and has a lively tempo stops us from feeling down, while soft, slow music helps us to sleep. The same is true for babies.
Most parents can recollect singing to their babies soft lullabies in order to help them sleep.
Some people consider that music has the ability to make babies smarter, such as by playing for them classical music. However, there is currently no scientific evidence one way or the other.