A more thorough explanation:

Definition: Decorum refers to the customs of formality and courtesy that are observed by the members and chair in conducting business in parliamentary law.

Examples: In a parliamentary meeting, decorum requires that members address each other with respect and refrain from using offensive language or gestures. The chair must also maintain order and ensure that everyone has a chance to speak without interruption.

Explanation: Decorum is important in parliamentary law because it helps to maintain a respectful and productive environment for conducting business. By following the customs of decorum, members can express their opinions and ideas without fear of being attacked or disrespected. The chair plays a crucial role in upholding decorum by enforcing the rules and ensuring that everyone has a fair chance to participate in the discussion.