Which metric best measures how quickly a page loads for users?

Which metric best measures how quickly a page loads for users?

• A. Time to first byte.
• B. Page load time.
• C. Bounce rate.
• D. Session duration.

Answer: (B)

Page load time is the best measure because it captures the full duration from the moment a user requests a page to the moment the page is fully rendered and ready in the browser. It reflects the entire process—server response, network transfer, and client-side rendering—so you see the true wait time a user experiences. Time to first byte only tells you how long until the first byte arrives, not how long it takes for the page to become usable, so it misses much of the user’s actual wait. Bounce rate and session duration describe user behavior after the page loads, not how quickly the page arrives, so they don’t measure load speed.

Page load time is the best measure because it captures the full duration from the moment a user requests a page to the moment the page is fully rendered and ready in the browser. It reflects the entire process—server response, network transfer, and client-side rendering—so you see the true wait time a user experiences. Time to first byte only tells you how long until the first byte arrives, not how long it takes for the page to become usable, so it misses much of the user’s actual wait. Bounce rate and session duration describe user behavior after the page loads, not how quickly the page arrives, so they don’t measure load speed.