Glossary
Page speed
Page speed is the time it takes for a webpage to render and become interactive, measured by metrics like LCP, INP, and TTFB.
Page speed is the umbrella metric for how quickly a webpage loads. It's composed of several sub-metrics including TTFB (Time to First Byte), LCP (Largest Contentful Paint), and INP (Interaction to Next Paint).
Page speed is both a user-experience metric and a Google ranking factor (via Core Web Vitals). Slow pages bounce users and lose rankings even with great content.
Example
Migrating a marketing site from WordPress (LCP 4.2s) to a Next.js-based AI website builder (LCP 1.1s) typically delivers a measurable bounce-rate reduction in the first week.