Censorship is the intentional suppression or restriction of information, ideas, or expression by an authority, institution, or other controlling entity. As an academic concept and research field, it investigates the mechanisms, motivations, and consequences of such control over communication flows. Key characteristics include the exercise of power to define acceptable discourse and limit public access to certain content, with its significance residing in its impact on intellectual freedom, political dynamics, cultural production, and the shaping of knowledge and narratives within societies.