Feature flagging is a crucial tool in software development that allows developers to enable or disable specific features within an application without deploying a new version, thereby saving time and resources while enhancing user experience. This approach is widely adopted by major companies like Apple, Amazon, and Google, as it facilitates risk mitigation by enabling developers to test features on a limited user base before full rollout, reducing bugs and security vulnerabilities. Feature flagging accelerates development cycles by allowing real-time testing and iteration, and it also aids in avoiding delays from feature dependencies. Additionally, it offers customization by tailoring specific features to user groups, enhancing user engagement and satisfaction. The process involves setting features off by default for safe testing and gradual user exposure, with performance metrics guiding the full launch. Platforms like Statsig simplify this process by offering tools to manage feature flags through configuration files or user-friendly dashboards, allowing developers to control feature deployment efficiently and safely.