We make friends and become part of the community by being polite. Greetings are often the first social communication a baby learns. Consider the following example:
Babies learn from our models. If we use similar, consistent greetings every day, they become part of a greeting routine.
Greetings are important as a social tool. Our babies who are deaf and hard of hearing need to be aware that they should greet others, too.
Even before your baby is ready to say "Hi," or "Thank you," he will be able to wave "Bye-bye." Saying goodbye is another early social routine that babies learn.
Two other early kinds of polite conversation are appreciation and apology. Learning "Thank you" and "Excuse me," or "I'm sorry," is very much like learning to greet people.
Your baby sees or hears you, learns from watching interactions, and learns from seeing you communicate with other people. You want to be sure that your baby can connect what you are saying with what is happening at the time. This makes the reasons for using social language clear.
Social language has a lot to do with how people respond to us in the community.