TTFB (Time to First Byte)

SEOWeight 1.5%Score 100

What this is

How long the server takes to start sending the page after the browser asks for it (Time to First Byte, TTFB).

Why it matters

A slow server makes everything after it slow too. It isn't one of Google's core metrics, but it's often the root cause of a slow page.

What counts as passing

800 ms or less passes; 800–1800 ms is a partial pass; over 1800 ms fails; not scored when no speed data was collected.

Evidence

Unit

Measured value

2.117

Metric

TTFB

Measured time

2ms

Thresholds

Needs-improvement threshold	1800
Good threshold	800

Pass threshold

800ms

Raw data

Check ID seo.cwv.ttfb

{
  "unit": "ms",
  "value": 2.117,
  "metric": "TTFB",
  "formatted": "2ms",
  "thresholds": {
    "ni": 1800,
    "good": 800
  },
  "goodFormatted": "800ms"
}

Suggestion

Pro plan only

TTFB 2ms exceeds target 800ms

Enable caching, use a CDN, and review server processing and database query performance.