What Are Core Web Vitals?
Core Web Vitals are Google’s page experience metrics for assessing loading performance, responsiveness and visual stability. The assessment uses field data from real visits to show how pages perform for users. The main measures are Largest Contentful Paint, Interaction to Next Paint and Cumulative Layout Shift.
Quick Facts About Core Web Vitals
Category
Web performance metrics
Used for
Assessing page experience
Common confusion
Not a single speed score
Also called
CWV
Often discussed with
Technical SEO
Key Takeaways About Core Web Vitals
- They focus on loading, interaction and layout stability.
- Real-user data reveals performance on actual devices and connections.
- They are not the same as a general page-speed score.
How Core Web Vitals Works
Core Web Vitals are measured through signals that describe how a page behaves during a real visit. Largest Contentful Paint reflects when the main content becomes visible. Interaction to Next Paint reflects how quickly the page responds after a user action, while Cumulative Layout Shift records unexpected movement during loading.
Related glossary terms: Page speed, User experience, Mobile-first indexing.
Google Search Console reports performance patterns for eligible pages, while browser tools can help diagnose the underlying causes. Large images, delayed scripts, third-party code and unstable page elements can affect the results. Developers and SEO specialists use the findings to connect a reported issue with a specific page resource or layout decision.
Expert Note
When we review Core Web Vitals, we check reported field data alongside page-level tests. Our team then traces poor results to assets, scripts, hosting behaviour or layout changes. We assess fixes on important service and location pages so technical work supports the site’s search visibility and user experience.
Core Web Vitals in Practice: A Real-World Example
A Sydney dental clinic page may show a delayed main image because the image file is large or loads after other content. A technical SEO review can identify the asset and assess whether its format, delivery or placement contributes to the reported result.
Related Services
Related Terms
Page speed
Page speed is the time a web page takes to load and respond to a visitor’s…
User experience
User experience is the overall impression formed when a person uses a website, including how easily…
Mobile-first indexing
Mobile-first indexing is the process Google uses to assess and index the mobile version of a…
Google Search Console
Google Search Console is a free Google service that shows how a website appears in Google…
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