A petition is a written document that allows individuals to express their support or opposition to a particular cause, issue, or request. It typically includes a concise statement of the purpose or goal, followed by spaces for signatures from those who endorse the petition. Petitions are often used as a tool for advocacy and collective action, aiming to bring about change or raise awareness on important matters. They can be submitted to various entities such as government officials, organizations, or decision-making bodies to demonstrate public opinion and push for desired outcomes.