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Core Web Vitals

Focus on the metrics that matter most

Google’s Core Web Vitals are a set of metrics – Largest Contentful Paint, First Input Delay, and Cumulative Layout Shift – that are intended to help you understand different aspects of the user experience, from rendering speed to visual stability. As a Google ranking factor, Web Vitals are key metrics for you to track.

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Web Vitals Tour Video
Guide to Core Web Vitals
Everything you need to know about Web Vitals, why they matter (especially for SEO), and how to track them.
Web Vitals
SEO and web performance
How much does web performance matter when it comes to SEO? A lot! Here’s what you need to measure, what to optimize, and how to create an SEO dashboard in SpeedCurve.
Web Vitals
Watch: Tour the Vitals dashboard
In this short video, we show you how to use your SpeedCurve Vitals dashboard to get a current snapshot of Core Web Vitals on your site.
Web Vitals
Contextual Web Vitals recommendations
Your Lighthouse performance audits are badged with the Core Web Vitals metric they affect. Fix those issues and you should see an improvement in your Core Web Vitals and Lighthouse scores.
Web Vitals
Watch: How to track Core Web Vitals
Learn how to set up continuous Vitals monitoring across your pages. Create performance budgets so you can be alerted if you exceed your thresholds.
Distribution / Time Metrics
Distribution and Time-series Metrics
We show you each metric in both a distribution chart and a time-series chart. This helps you identify if anomalies are related to a cohort of users or to a configuration on your end.
Largest Contentful Paint Visuals
We show you the frames before and after each Largest Contentful Paint (LCP) event, as well as highlighting the LCP element. This makes it easy for you to identify and improve the element that contributes to your LCP score.
JavaScript Time
First Input Delay and JavaScript time
First Input Delay (FID) is heavily influenced by how well your JavaScript is performing. We identify all the JS running on your pages – breaking it down by domain and total time – making it easy for you to identify any poorly performing scripts.
Cumulative Layout Shift visuals
Solving CLS issues just got easier! We identify each layout shift that happens on the page and show a before-and-after frame that highlights each element that contributed to the CLS score.
Web Vitals in Action
UK Government Digital Service use SpeedCurve to track Core Web Vitals
The UK Government Digital Service (GOV.UK) uses SpeedCurve Synthetic and RUM to improve their web performance: “Using SpeedCurve we can now set a whole bunch of performance budgets and alerts that let us know, via email and Slack, when a particular threshold has been crossed in the metrics we are monitoring.”