Core Web Vitals is a new initiative from Google designed to measure and improve user experience on the web.
Core Web Vitals’ focus is for a better user experience and the below metrics are the most important ones for providing a great user experience.
At the moment, there are three Core Web Vitals:
- Largest Contentful Paint (loading performance)
- Cumulative Layout Shift (visual stability)
- First Input Delay (interactivity)
Google’s thresholds for these 3 metrics are as follows.
Largest Contentful Paint (LCP) measures how long it takes for the most meaningful content on your site to load:
Good — Less than or equal to 2.5 seconds
Needs Improvement — Less than or equal to 4.0 seconds
Poor — More than 4.0 seconds.
Cumulative Layout Shift (CLS) measures how much your site’s content “shifts” or “moves around” when it loads:
Good — Less than or equal to 0.1 seconds
Needs Improvement — Less than or equal to 0.25 seconds
Poor — More than 0.25 seconds.
First Input Delay (FID) is a responsiveness measurement and measures how long it takes for a page to respond after a user has interacted with it:
Good — Less than or equal to 100 ms
Needs Improvement — Less than or equal to 300 ms
Poor — More than 300 ms.
Core Web Vitals also Affect SEO and SEO results
This change will be in place starting with May 2021, this means that the Core Web Vitals metrics may affect your SEO performance.
How to Test & Measure Core Web Vitals
Using Website Performance Monitoring cloud service from LoadFocus you can test your website from 15+ world cloud locations on mobile and desktop devices and receive charts and insights for the Core Web Vitals metrics.
Create a New Test
Choose the desired location, the URL of your website, the device and repeat period for your test.
Monitor Core Web Vitals metrics for multiple pages and compare results
You can add multiple pages of your website and inspect the results using the reports and charts offered by LoadFocus.
Compare Core Web Vitals between multiple sites
List all your competitor and improve your site experience for your main user journeys.
Chrome Extension LoadFocus: Website Performance Monitoring
LoadFocus Website Performance Monitoring is powered by Lighthouse and focuses on modern user experience and performance metrics to help you deliver the best experience to your customers.
Written by Bogdan Vazzolla.
LoadFocus is a cloud testing platform, a load and stress testing tool which provides the infrastructure to run tests with thousands of concurrent users, from multiple cloud locations, in less than a few minutes, keep history of the results, compare different runs to inspect performance improvements or performance degradation. It also supports running JMeter load tests from the cloud and monitoring and audit web and mobile performance.