Question: Select all that apply. What is Cumulative Layout Shift?
- A Core Web Vital
- A measure of loading performance
- A measure of interactivity
- A measure of visual stability
Explanation
Cumulative Layout Shift is part of Core Web Vitals in HubSpot’s site speed reporting. It evaluates whether page elements move unexpectedly while the page is loading, which is a measure of visual stability rather than loading speed or interactivity. HubSpot describes poor scores with examples such as buttons shifting position before a visitor can click them. That is why the valid selections are the one tied to Core Web Vitals and the one tied to page stability. HubSpot Knowledge Base+1
Why the other options are incorrect
B) A measure of loading performance is incorrect because HubSpot uses other metrics for loading performance, while Cumulative Layout Shift specifically measures element stability. HubSpot Knowledge Base+1
C) A measure of interactivity is incorrect because interactivity is tracked by metrics such as Interaction to Next Paint, not by Cumulative Layout Shift. HubSpot Knowledge Base
Source for verification
https://knowledge.hubspot.com/seo/use-the-site-speed-dashboard
https://developers.hubspot.com/docs/cms/best-practices/testing-staging-performance/speed
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