Customs are ways of behaving or doing certain things. When we meet someone, we often shake their hand. This is an example of a custom, but not all people follow this particular custom.

As well, different parts of the world celebrate many different holidays and events. What is celebrated depends upon family background, values, and beliefs.

Many customs develop because of needs. In order to stay healthy, we need to keep clean. Around the world people have customs which involve cleanliness.