To have “manners” is having the knowledge of how to properly interact with people within a specific cultural framework. Many of these are small, but immensely important, actions such as knowing when to stand or sit, whether or not to shake hands, when to wear a head covering and when or where to remove it, how to properly use silverware, and how to properly address other people (Mr. or Mrs. or by first names). Some cultures consider it impolite to point or to look other people directly into their eyes, and some consider it polite to belch after a meal. Normally, these are things that you absorb from your family while growing up.