GLOSSARY
Time to First Byte
IN ONE SENTENCE
TTFB is the time from issuing a request to receiving the first byte.
TTFB is the time from issuing a request to receiving the first byte.
01
In detail
It affects crawling more directly than user experience: slow responses reduce crawl frequency. When crawl volume drops sharply, TTFB and error rate are the first two things to check.
Updated 2026-08-06