Monitoring is the process of ensuring an application's system operates as it should, tracking metrics such as speed and scope. Observability, on the other hand, collects data from individual user sessions to provide a wealth of information that allows developers to devise solutions much quicker before users bounce or give up on their app entirely. While monitoring can tell you when an issue occurs, observability helps identify precisely what's causing the problem and how to fix it. Both tools complement each other and are essential for maintaining a well-functioning app that consumers actually use. Observability provides more context about system problems, analyzing user sessions to give actionable insight into issues like session replay, device battery, network connectivity, and more. The key differences between monitoring and observability lie in their approach: monitoring is limited by the predictability of system failures, while observability compensates for this limitation by collecting data from individual user sessions. Observability tools collect three types of data: metrics, logs, and traces, which provide a wealth of information to help developers identify problems and devise solutions quickly.