This document discusses approaches to monitoring digital user experience. It defines digital user experience and explains why it is important. Common approaches covered include analytics, synthetic user monitoring, real user monitoring, and infrastructure monitoring. Both synthetic and real user monitoring are needed to fully understand user experience. Real user monitoring provides insight into actual user behavior and interactions but requires users. Synthetic monitoring allows testing when no users are present. Infrastructure monitoring helps identify performance issues related to applications and infrastructure. Together these approaches provide full visibility from end users to infrastructure.