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Hello everyone,

I want to know about core web vitals. How to fix these errors. My common layout shift is greater than 0.25. How to reduce this.
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I have no idea what you're talking about. What "core web vitals?" What is a "common layout shift?" What errors do you see? Please *show* them, since none of us is sitting in front of your computer.

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CLS is stands for cumulative layout shift. If you have a lengthy page then CLS is natural because in page which have much content we use div and p tag images etc many times.

To remove the CLs issue first you need to check the page structure and hierarchy of nesting tags and, also check the both side  (left and right) edges of the page that any content is not out of the margin line or inside of the margin line.
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Core Web Vitals are a set of specific factors that Google considers important in a webpage’s overall user experience. Core Web Vitals are made up of three specific page speed and user interaction measurements: 

  • Largest Contentful Paint
  • First input Delay
  • Cumulative Layout Shift

Read more - web.dev/#core-web-vitals

It is not mentioned in the link above, but server speed, and how long it takes to deliver files, plays a big part on this measurement.

    CORE WEB VITALS         OTHER WEB VITALS    
LOADING
Largest Contentful Paint (LCP)
MOBILE FRIENDLY
INTERACTIVITY
First Input Delay (FID)
SAFE BROWSING
VISUAL STABILITY
Comulative Layout Shift (CLS)
HTTPS
NO INTRUSIVE INTERSTITIALS

Core Web Vitals can be tested using Google's Pagespeed Insights, and will also give you a full detailed list of things you could do to improve this score.

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The Core Web Vitals report shows URL performance grouped by status (Poor, Need improvement, Good), metric type (CLS, FID, LCP), and URL group (groups of similar web pages). The report is based on three metrics as measured by actual user data: LCP, FID, and CLS.
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Core Web Vitals are a set of metrics defined by Google that evaluate the user experience on a web page. These metrics focus on key aspects such as loading, interactivity, and visual stability of a site. Since May 2021, Google has integrated these metrics into its ranking algorithm, meaning that sites that optimize their Core Web Vitals can achieve better positions in search results. Below are the three main metrics that make up the Core Web Vitals: LCP, FID, and CLS.

Largest Contentful Paint (LCP)
LCP measures the time it takes for the main content of a page to load. In other words, it evaluates how long it takes for the user to see the most important content on the page. To provide a good user experience, the LCP should occur within the first 2.5 seconds of the page starting to load. A good LCP ensures that users can quickly interact with the page's content, which is crucial for retaining their attention and reducing the bounce rate.

First Input Delay (FID)
FID measures the time from when a user first interacts with a page (e.g., clicking a link, pressing a button, etc.) to when the browser responds to that interaction. It is essential for evaluating the page's interactivity. An FID of less than 100 milliseconds is considered good. A low FID is crucial for the user experience because a page that responds quickly to interactions can prevent frustration and improve user satisfaction.

Cumulative Layout Shift (CLS)
CLS measures the visual stability of a page and refers to the amount of unexpected layout shift of the visual content. These shifts can occur when additional resources load on a page, such as images, videos, or ads, altering the position of visible content. A good CLS should be less than 0.1. Minimizing CLS is important to avoid frustrating experiences, such as when a user is about to click on something, and the page shifts unexpectedly, causing accidental clicks and a negative experience.

Importance of Core Web Vitals
Core Web Vitals are fundamental because Google uses them as ranking factors in its search engine. This means that websites that do not optimize these metrics may lose positions in search results, which could reduce their visibility and organic traffic. Besides their impact on SEO, Core Web Vitals are crucial for user experience. Studies show that pages that load quickly and are stable and interactive retain users better, increase the time spent on the site, and improve conversion rates.

How to Improve Core Web Vitals
To optimize LCP, several techniques can be applied, such as optimizing images, improving server response times, and using an efficient caching service. To reduce FID, it is advisable to minimize the use of JavaScript and break long tasks into smaller tasks so that the browser responds more quickly to user interactions. To improve CLS, it is essential to set dimensions for all multimedia elements (images, videos, etc.) and avoid inserting dynamic content that does not reserve adequate space.
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