2. Cumulative Layout Shift (CLS)
This Core Web Lifecycle metric concerns user interaction with links, links, and buttons that are created to increase a website's click-through rate (usually sales and conversions for a specific call to action).
Cumulative Layout Shift identifies links or buttons that move after a web page has loaded and simulates the level of difficulty a user might experience when trying to interact with the web page element.
User experience and design are important components of a good user experience.
If people browsing a web page constantly see elements moving while trying to read, they may not appreciate its content.
The CLS metric helps determine which images or links should be moved around on a page to improve its usability, increase click-through rates, and increase online sales.
What elements does CLS analyze?
CLS measures whether elements of the visible screen move from their initial position between two rendered frames. In short, it is used to understand whether content such as text, buttons, and banners change position as a user reads the content on a specific page.
Elements that change chinese overseas america phone number data position can confuse users and affect their experience on the page, so it is important to ensure that everything stays in place once the page is loaded on the user's device.
CLS examines key metrics to determine the visual stability of a page from a user's perspective by considering several factors:
Layout Shift
Impact Score
Score Far
Total Blocking Time
Total Blocking Time (TBT) allows you to assess how long it takes a web page to respond to a specific user input. This metric identifies pages with unnecessary
0 – 300 ms: Fast (Green Light)
300 – 600 ms: Average (Orange Light)

+600 ms: Slow (Red Light)
Page Performance Score
Page Performance Score is the metric used to calculate all key user experience values in Core Web Vitals.
This score uses an aggregate value system for all visits on mobile and desktop devices. A weighted average is taken to provide a single score to understand which pages need a quick double-check.
While these metrics are highly simplified, the Core Web Vitals monitor can reference scores for each category with specific scores of 90 (good), 50-90 (needs improvement), and below 50 (poor).
Core Web Vitals Lighthouse Score Calculator Easy Web Marketing Nicola Onida SEO Copywriter
Are you ready to scan your website’s Core Web Vitals?
Now you know that you have a special tool at your side that can help you understand how your website is performing and which parts can be improved. What is an SEO Audit
An SEO audit is an in-depth SEO analysis designed to identify technical and content aspects that are negatively impacting your website’s visibility.