Question 1

What is TTFB (Time to First Byte)?

Accepted Answer

TTFB (Time to First Byte) is the time from when a browser sends an HTTP request to when it receives the first byte of the response from the server. A TTFB under 200ms is considered excellent; above 600ms indicates server-side performance issues.

Question 2

What is a good website response time?

Accepted Answer

A good server response time (TTFB) is under 200ms. Google recommends keeping TTFB below 600ms. Total page load time should ideally be under 3 seconds. Slow response times increase bounce rates and hurt search rankings.

Question 3

What does the Speed Grade measure?

Accepted Answer

The Speed Grade (A–F) is based on your server's actual timing metrics: DNS lookup, TCP connection, TLS handshake, Time to First Byte (TTFB), and download time. Lower times result in a higher grade.

Question 4

What are security headers and why do they matter?

Accepted Answer

Security headers are HTTP response headers that instruct browsers on how to handle your site's content — preventing XSS attacks, clickjacking, MIME-type sniffing, and more. Important ones include Content-Security-Policy, X-Frame-Options, Strict-Transport-Security (HSTS), and X-Content-Type-Options.

Website Speed Test