Politifact is a fact-checking website that evaluates the accuracy of statements made by politicians, public officials, and other influential figures. Founded in 2007, it aims to provide transparency and accountability in political discourse by verifying claims and providing evidence-based assessments. The site uses a rating system called the "Truth-O-Meter," which ranges from "True" to "Pants on Fire," to indicate the level of accuracy of a statement. Politifact also offers detailed explanations and sources for its ratings, helping readers understand the context and reasoning behind each evaluation.