Citizen participation or public participation in social science refers to different mechanisms for the public to express opinions—and ideally exert influence—regarding political, economic, management or other social decisions. Participatory decision-making can take place along any realm of human social activity, including economic, political, management, cultural or familial.

Public consultation, public comment, or simply consultation, is a process by which members of the public are asked for input on public issues. This can occur in public meetings open to all in written form, as well as in deliberative groups. Surveys and deliberative groups can be conducted with self-selected citizens or with statistically representative samples of the population which enables the identification of majority opinion. Its main goals are to improve public involvement and influence, as well as the transparency and efficiency of government projects, laws, or regulations.