Modern software development involves iterations guided by product managers, developers, designers, and data scientists who observe user behaviors and collect feedback. However, even well-tested code can encounter bugs in production that require rollbacks or hotfixes. Feature flags are a powerful strategy for quickly identifying what works and what doesn't. They allow software to be released to a limited subset of users, enabling A/B testing and gradual feature releases. This technique helps uncover potential issues before they affect all users and allows for controlled changes without fear of breaking anything.