LLM observability is a critical aspect of deploying language model applications in production, focusing on comprehensive monitoring, tracing, and analysis to maintain their reliability. As traditional observability tools fall short for LLM applications due to their complexity and non-deterministic outputs, specialized observability is required. Key pillars include detailed tracing of workflows, evaluating model outputs, prompt engineering, optimizing search and retrieval processes, and ensuring robust security measures. Tools like Helicone facilitate these processes by offering features such as session tracking, automated evaluations, prompt management, and security protocols, all aimed at reducing hallucinations, improving output quality, managing costs, and safeguarding against potential threats.