Nonfiction cinema refers to films that present factual information about the world, focusing on real events, people, and issues. This genre includes documentaries, biopics, and educational films, aiming to inform or educate the audience rather than entertain through fictional storytelling. Common techniques in nonfiction cinema include interviews, archival footage, and observational filming. Notable examples include documentaries like "March of the Penguins" and biopics such as "The Social Network," which explore real-life subjects and events. Nonfiction cinema plays a crucial role in raising awareness and promoting understanding of various topics, from history to social issues.