Open Chrome DevTools by pressing F12 on Windows or Linux, or Command+Option+J on Mac. Alternatively, right-click anywhere on a page and select "Inspect," then click the "Console" tab at the top of the DevTools panel. The console displays JavaScript errors, warnings, network issues, and any console.log() statements developers add to their code. The console shows timestamps on the left, message type icons (red for errors, yellow for warnings, blue for info), and the actual output on the right. Click the filter icon to show only errors, warnings, or specific message types. Use the search bar to find specific terms in thousands of log entries. Click any error to see the stack trace and source file location. For SEO and tracking work, the console reveals Google Analytics implementation errors, Tag Manager firing issues, broken scripts blocking page rendering, and CORS problems with third-party resources. We catch 60–70% of tracking bugs by checking the console before and during user interactions like form submissions or checkout flows. Red errors often correlate with broken conversion tracking or missing ecommerce data. Clear the console with the 🚫 icon or Ctrl+L to start fresh when testing specific actions. Enable "Preserve log" (checkbox at the top) to keep console messages across page navigations, critical when debugging redirects or multi-step forms. Enable "Log XMLHttpRequests" in settings to see AJAX calls that might be sending analytics hits. At Ottawa SEO, we screenshot console errors during technical audits and include them in reports with line numbers and file paths so developers know exactly what to fix. We also use the console for quick JavaScript tests: type document.querySelectorAll('h1').length to count H1 tags, or dataLayer to inspect Tag Manager's data object. The console is faster than view-source for live debugging because it reflects the DOM after JavaScript execution, not just the raw HTML served by the server.