Learn how to effectively use Playwright's Trace Viewer, a powerful GUI tool for analyzing executed tests. Discover the purpose of Trace Viewer and its ability to provide detailed snapshots, timelines, and other trace information. Follow step-by-step instructions to set up and run traces, including configuring the config file and executing tests. Explore various Trace Viewer options, such as 'on-first-retry', 'off', 'on', and 'retain-on-failure', and learn how to set traces from the command line. Gain insights into different methods for viewing traces, including using commands, HTML reports, and online utilities. Master the technique of setting tracing programmatically within your test code. This comprehensive tutorial equips you with the knowledge to leverage Trace Viewer for enhanced test analysis and debugging in your Playwright automation projects.