Greetings are important. A greeting can be so powerful that it

can even turn your frown into a smile and quickly put you in a good mood. A greeting is one of the basic functions of communication and triggers positive conversations. It helps us connect to people at a more personal level. A hello can make friends of strangers, and it can bring a smile to someone who is alone. A hello can change how we feel about a person, place and ourselves.
Notice it when someone says hello to you and you say hello back!