"The Great Hack" is a documentary that explores the impact of data privacy and manipulation on democracy. It focuses on the role of Cambridge Analytica, a political consulting firm that harvested personal data from millions of Facebook users without their consent to influence elections, including the 2016 U.S. Presidential Election and the Brexit referendum. The film highlights how personal data is used to create targeted political advertisements, raising ethical questions about privacy and the power of technology in shaping public opinion. It emphasizes the need for greater awareness and regulation regarding data usage in the digital age.