We monitor metrics and logs to see how our application and infrastructure performance impacts the experience of our product’s end user. By capturing, categorising, and then analysing data and logs generated by applications and infrastructure, we understand how changes or updates impact users, shedding insights into the root causes of problems or unexpected changes. Active monitoring becomes increasingly important as services must be available 24/7 and as application and infrastructure update frequency increases. Creating alerts or performing real-time analysis of this data also helps us more proactively monitor these services.