// Performance
The time from when a browser requests a page to when it receives the first byte of the response. A TTFB over 600ms usually indicates server-side performance issues — slow database queries, missing caching, or distant hosting.
Why it matters: TTFB (Time to First Byte) is one of the performance signals that shapes how search engines, AI tools, and real visitors experience your website. Getting it right removes friction, protects your rankings, and makes every other optimization work harder. Auditing it regularly is the fastest way to catch regressions before they cost you traffic or conversions.
See how your own site handles ttfb (time to first byte) — no signup required.
Check your site's TTFB (Time to First Byte) — run the free Page Speed Agent