A behavior, that shows your polite and pleasant behavior towards everyone.
Take a challenge to share few words/statements that shows you are courteous.
Courtesy means "The showing of politeness in one’s attitude and behavior towards others”.
Saying “please” and “thank you” shows that you are polite to the person you are talking to. Other ways to show politeness is to be quiet when there is a conversation going on, not interrupting, and to not dominate a conversation. Being polite is important in society. It helps society run smoothly and shows that you are a well-mannered person.