DEF CON is one of the world's largest and most well-known hacker conventions, held annually in Las Vegas, Nevada. It brings together cybersecurity professionals, hackers, researchers, government officials, and enthusiasts to discuss and explore topics related to information security, hacking, and technology. 

DEF CON serves as a platform for advancing cybersecurity knowledge, fostering innovation, and addressing global security challenges. It also helps bridge gaps between different sectors of the cybersecurity ecosystem, encouraging collaboration and awareness.