Bug bounty programs involve paying security researchers rewards for finding vulnerabilities in companies' products. To participate, researchers need to understand the target company's products and domains, know which companies offer bounties, and find bugs that are in scope like XSS, SQL injection, or authentication bypasses. Rewards can range from $100 to $20,000. Major companies like Google, Facebook, and Mozilla run bounty programs and have collectively paid over $1 million to researchers. Examples are shown of real bugs found and reported through bounty programs. The conclusion encourages reporting bugs to companies rather than selling vulnerabilities.