Core Web Vitals – How To Optimize Your WordPress Website For LCP, FID, and CLS

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What are Core Web Vitals and How To Optimize Your WordPress Website For LCP, FID, and CLS?. First, let’s find out.

1. What are Core Web Vitals?

Core Web Vitals are three metrics that score a user’s experience loading a webpage and decide your website’s ranking. These metrics score how quickly page content loads – LCP, how quickly a browser loading a webpage can respond to a user’s input – FID, and how unstable the content is as it loads in the browser – CLS.

  • LCP – Largest Contentful Paint ( Loading )
  • FID – First Input Delay ( Interactivity )
  • CLS – Cumulative layout Shift ( Visual Stability )

2. Why are Core Web Vitals important?

Google Ratings added Core Web Vitals – user experience ratings to their overall ranking. This means that in addition to SEO, Core Web Vitals is extremely important in evaluating effective user experience and the first decision to attract users to your website.

  • Improving user experience
  • The Future of SEO

To improve Core Web Vitals, access to your website should be fast, smooth, easy to use, and your website will rank high in Google Search Engine. Core Web Vitals are the future of SEO and user experience.

3. How do Core Web Vitals affect SEO?

Rockcontent reports that, if it takes longer than 5 seconds to load your website, you will lose more than 37% of your traffic. Walmart discovered that the faster your page loads by 1 second, the conversion rate of that site also increases by more than 2%. When AutoAnything accelerates page load by 50%, online revenue also increases by 11-12%. Overall, this will help keep users stay longer, read your content more and more likely to buy. Therefore, Core Web Vitals is not only an inanimate set of indicators that affect SEO; it also affects your business.

4. LCP – Largest Contentful Paint ( Loading )

4.1 What is LCP – Largest Contentful Paint (Loading)?

LCP – Largest Contentful Paint: is the time it takes for the browser to display the largest element in the frame and is counted from the time when the user requested the URL. The LCP metric is extremely important because it informs users that their request is being executed. These largest elements are usually large block-level images, videos, animation, or text elements. etc. The largest element is usually any of these:

  1. <H1 tag>
  2. Image
  3. Background image
  4. Video
  5. Animation
  6. Block-level element

If your website’s LCP is < 2.5s and measured by Google Page Speed Insight, it will be considered fast.

4.2 How to Optimize LCP – Largest Contentful Paint (Loading)

  • Optimize Java Scripts, Avoid loading heavy third-party JavaScript
  • Optimize CSS, remove unimportant CSS
  • Improve your Server quality, asking your hosting provider
  • Optimize image size, format, and size before uploading (Reduce image’s size using JPEG2000, WebP)
  • Optimize fonts (host locally, preload, use font-display: swap, reduce weights/icons)
  • Use Plugins that support page loading, image loading, video loading, etc. You can use Lazy Load Plugin.

5. FID – First Input Delay (Interactivity)

5.1 What is FID – First Input Delay (Interactivity)?

FID – First Input Delay: is the time from when a user first interacts with your website (clicking on a link, a signup button, etc) to the time that the browser responds to that user interaction. It’s like the time from when you call someone to the time that person answers you. According to Google’s announcement, the FID index needs to be under 100 milliseconds for a good user experience. In addition, this metric should be stable across all devices from mobile devices, tablets, laptops, and desktops.

5.2 How to Optimize FID – First Input Delay (Interactivity)

  • Eliminate or reduce the impact of 3rd party software code (video, ads, fonts)
  • Optimizing JavaScript Codes by removing unused JavaScript.
  • Avoid slow loading plugins
  • Using Cache plugins to check for issues
  • etc

6. CLS – Cumulative layout Shift (Visual Stability)

6.1 What is CLS – Cumulative layout Shift (Visual Stability)?

CLS – Cumulative layout Shift: This is an overall measure of how elements on your website are shifting during the entire time a user is using your page.  When users click on one link, Bottum, etc. but your website elements change, leading users to mistakenly click on elements they don’t want. Therefore, there will be a bad experience for users of your website. The CLS score has a value of 0 or more, if your website has a higher CLS score, the worse the user experience, and if your website is stable then surely the user experience will be great. 

6.2 How to Optimize CLS – Cumulative layout Shift (Visual Stability)

  • Do not display such as PopUp, Ads, Image, Video, etc on your website suddenly.
  • Do not show or avoid showing ads in the viewport.
  • Specify dimensions for video, images, etc

You can check CLS for your website in Google’s Layout Shift Debugger.

7. Top 7 Tools to measure Core Web Vitals – LCP, FID, CLS

Google’s popular tools for measuring Core Web Vitals and making it easy to find user experience errors and fix them. These 5 tools include:

7.1 Lighthouse

7.2 PageSpeed Insights

7.3 Chrome DevTools

7.4 Search Console

7.5 Web. dev’s measure Tool

7.6 Web Vitals Chrome Extension

7.7 Chrome UX Report

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