Category
Troubleshooting
Most sites fail the same handful of ways. Each page below starts from the symptom you can actually see, then gives the check to run and the fix for that stack.
Subcategories
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Crawler access
The crawler never reaches your content: WAF rules, robots.txt or a CDN challenge.
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Markup and data
The page is readable but says nothing a machine can use: missing or broken markup, titles, sitemaps.
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Rendering
The crawler arrives but reads nothing: client-side rendering and JavaScript-only content.