Chaos engineering is a proactive approach to system reliability that involves intentionally injecting faults to enhance a system's resilience and adaptability in the face of failures. This methodology aims to develop antifragile systems that not only withstand disruptions but also improve through them, emphasizing the importance of controlled experiments over random disruptions. Effective chaos engineering requires robust monitoring and high availability infrastructure to accurately understand and respond to the impacts of these tests. Tools like Netflix's Chaos Monkey are commonly used to simulate failures, ensuring systems can handle disruptions such as server terminations or network issues. The practice involves careful planning and communication to prevent unintended outages, emphasizing the need for rollback plans and stakeholder alignment. Ultimately, chaos engineering helps identify vulnerabilities and improve system robustness by simulating potential failure scenarios in a controlled manner.