Glossary/SEO & Content/Time to First Byte (TTFB)
SEO & Content
Time to First Byte (TTFB)
The time between a browser requesting a page and receiving the first byte of the server's response.
By Brandon Mina·CEO, BrandPilot AI·Updated November 2026
Short answer
Time to First Byte (TTFB) is the time between a browser requesting a page and receiving the first byte of the server's response. It reflects server processing, network latency and redirects. TTFB is not a Core Web Vital, but a slow TTFB delays every later loading milestone, including Largest Contentful Paint.