The digital customer experience (DCX) refers to the collective impression customers have when interacting with a company's website, mobile app, or other digital touchpoint. Monitoring DCX is crucial as it can impact revenue, customer satisfaction, and brand reputation. A great digital customer experience has three main dimensions: availability, functionality, and speed. To measure these dimensions, one needs to track various Key Performance Indicators (KPIs) such as user throughput, frontend error rates, backend response time, and application transaction times. Understanding the underlying technology metrics that feed into these dimensions is also essential for identifying potential issues before they affect customers. By monitoring DCX, development and operations teams can find and solve problems anywhere in the stack, ultimately delivering a better customer experience and impacting business success.