Words have meaning and your baby needs to learn them. Chatter on, in a litany of explanations to all things that are occurring: good morning, it’s time to get dressed, let’s change that diaper, today we are going to Grandma’s, etc. Your child needs to associate words with action. Building his vocabulary sets the foundation for learning and helps prepare him for school.
To read Why talking to baby can help build language and literacy competency, See:
He also wants to hear the sound of your voice which will nurture and soothe him. Talking to your baby, lets him know you're nearby, and available to meet his needs.