As websites become increasingly important for businesses, measuring and understanding their technology stack's contribution to delivering a great digital customer experience is crucial. The traditional focus has shifted from server-side applications and infrastructure to capturing a holistic understanding of performance from the frontend through the backend application services. Frontend customer experience is now an imperative due to the complexity of web applications, with 80% of page load time occurring in the browser. Frontend monitoring is essential to optimize performance, availability, functionality, and speed, allowing developers to identify bottlenecks, troubleshoot issues, and prioritize problems that make the biggest difference to users.