Sentry's distributed tracing provides clear visibility into every network request, API call, or database query as they flow through a Next.js app. It enables developers to quickly identify the root cause of an error, see how it impacts the overall user experience, and debug production traffic without accessing other people's code. This allows for effective debugging even in cases where access to source code is limited, deploying additional debug code isn't an option, or error messages are unclear. The trace view page displays the initial page load that triggered the error, along with each of the requests made, making it easier to identify the problematic line of code and fix the issue. With Sentry's tracing capabilities, developers can tackle production issues head-on, shortening the debugging cycle and improving overall performance.