Fact checkers ensure the reliability and credibility of published information by examining claims, consulting primary sources, reviewing datasets, interviewing experts, and using verification tools. They work across newsrooms, research organizations, NGOs, and digital media platforms to prevent misinformation and uphold editorial integrity. Increasingly, fact-checkers also evaluate online content, social media posts, manipulated visuals, and viral claims using OSINT (open-source intelligence) techniques. With global concerns over misinformation, political polarization, and digital manipulation, demand for skilled fact-checkers is rising across media, policy institutes, and international organizations.