Plain-English Definition
How quickly a page becomes usable; impacts user satisfaction and some ranking systems.
Category
Technical Performance, Accessibility, and Multimodal
Technical quality signals that affect fetchability, comprehension, and compatibility across devices and AI modalities.
Explore categoryRelated concepts
Other terms in this category that are worth understanding alongside this one.
A set of user experience metrics used to quantify loading speed, responsiveness, and visual stability.
Measures perceived load speed by timing when the largest content element appears.
Measures responsiveness by timing how quickly the page responds to user interactions.
Measures visual stability by tracking unexpected layout movement.
Storing resources to reduce repeat load time and server strain.
A distributed network that serves assets closer to users and bots, improving speed and resilience.
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