What are Core Web Vitals and how do they affect a website’s SEO?

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May 2021, Google announced that the so-called Core Web Vitals will start affecting the positioning of websites in the search engine. If you still don’t know what Core Web Vitals are and how they affect website positioning, and if You still believe that SEO is only about lead generation in marketing, than check out our article written in collaboration with experienced on the market SEO in Atlanta agency and SEO services Miami team, to get all of the necessary information. 

Basic information about Core Web Vitals 

Core Web Vitals are the basic web metrics internationally – SEO services Miami webmaster says. They were created by Google to make it easier for them to evaluate how well websites are aligned with user expectations. Implicitly, CWV are used to improve the quality of a website based on specific guidelines, which in the short term affects customer satisfaction, and in the long term, will help standardize the way websites are optimized and improve their performance on a global scale. 

Types of basic web metrics 

SEO in Atlanta agency goes a bit deeper – In order to effectively measure and analyze the quality of a website, Google has implemented three ratios with specific thresholds that should be exceeded in order to provide the audience with optimal website performance. They are:


This indicator determines the speed at which a user will see the largest element of the site (image or block of text) after entering the site.

  • Good result: less than 2.5 seconds;
  • Score needs improvement: 2.5 to 4 seconds;
  • Wrong result over: 4 seconds.

When specifying CP, Google takes into account traktyvideo> and <img> img> in the <list attributes, as well as blocking elements and with a background image loaded by the url () function.


Google measures after how many seconds a website starts responding to user actions, i.e. – in short – after what time it responds to pressing a button or clicking a link.

  • Good result: less than 100 ms;
  • Result To Improved: 100 to 300 ms;
  • Bad result: more than 300 ms.

The tip from SEO in Atlanta agency – remember that scrolling or zooming is not taken into account in the FID factor.


To understand what layout shifting is, you have to visualize this situation: you are reading an article on a page and the text unexpectedly moves upwards, making you lose your bearings and you don’t know where you left off. This is because site elements load asynchronously.

CLS counts the number of shifts in the period of operation of the page, where 0 means that they are completely absent, therefore:

  • Good result: less than 0.1;
  • Score Needing Improvement: 0.1 to 0.25;
  • Bad result: above 0.25.

Core Web Vitals and SEO 

Once you know all the CWV metrics, it’s time to answer the question: how do they affect a website’s SEO? Well, the coefficients implemented by Google are now an important aspect in SEO. This is due to the fact that the user experience of websites has become an extremely important issue for Google. Users should enjoy fast-loading, intuitive and adaptable pages for different screens, they will adore thrilling lead generation in marketing and with this comes a visible emphasis on optimization. 

In addition to LCP, FID and CLS, Google also takes into account when positioning:

  • Adaptation for mobile devices, 
  • Secure browsing, 
  • HTTPS security,
  • Guidance on intrusive full-screen ads.

You can get a report on these and other factors in Google Search Console, as well as PageSpeed Insights and other tools. Once you know how your site’s performance looks, you can make the appropriate adjustments to raise the level of each ratio. The lower they are, the worse the website will be in terms of search engine position.

However, it is worth remembering that the Core Web Vitals system was designed primarily for the comfort and satisfaction of users and is as important for SEO as lead generation in marketing – after the implementation of the changes in May 2021, the SEO turnover was not as noticeable as initially expected. As SEO services Miami wrote: “The current situation can be interpreted in such a way that, for the time being, the new factor has not yet been given a very high weight, while it can be expected that this will be modified according to the direction Google has taken. It will be an increasingly important element”.

main photo: caio/unsplash.com

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  • Chloe Fields 22.07.2022

    At a time when SEO is constantly evolving, web metrics allow us to keep pace with these changes. Thanks to them, we can see if our SEO activities are effective. It is important to check the quality of your website regularly and make any necessary changes. Such actions will put your website in a high position in SERP. It is worth pointing out that Search Engine Optimization is a complex and demanding process. Therefore, you will have to spend a lot of time and commitment on these actions.