This new Site Reliability Engineering glossary provides a comprehensive collection of concepts, tools, and practices for SRE professionals, covering essential topics like monitoring, testing, and observability. By gathering insights from the Reddit community, the glossary aims to make complex SRE ideas more accessible and easier to grasp. It delves into various aspects of SRE, including deployment strategies, Kubernetes and containerization, operational concepts, service management and networking, testing and validation, development and infrastructure management, performance optimization, security and compliance, collaboration and culture, advanced Kubernetes concepts, additional observability and monitoring, scalability and reliability, and core principles. The glossary offers a fresh perspective on SRE, highlighting the importance of rigorous monitoring and observability in upholding system reliability and adapting to operational dynamics effectively.