Glossary · Delivery and rendering

TTFB

Time to first byte: how long a server takes to begin answering. It is the speed measurement that matters most to a crawler, because a crawler that times out records nothing at all.

Delivery and rendering

What arrives on the wire, and what only exists after something else runs.

payload ratio · render dependence · render dependence gap · edge cache pinning · Core Web Vitals · CrUX · field data · prompt injection · Hydration mismatch · Dynamic rendering · DOM depth · Edge transformation · 202 interstitial · rate limiting · bot management platform

← edge cache pinning  ·  Core Web Vitals →

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