What are core web vitals? How to improve its score in 2021?

If you are still having a hard time optimizing your blog for one of the recent updates, known as a mobile-first indexYou may have to deal with two different updates at the same time.

Because if you have not updated your blog according to the mobile-first index we recommend you work on it before chasing other updates.

what are core web vitals?

As the new updates keep coming, you may have to tackle many of them in the upcoming months for sure.

Core web vitals are going to be converted into an important factor for the ranking system with the May 2021 update from Google!

What are core web vitals? How to improve its score in 2021?

However, most beginner bloggers are not aware of detailed metrics and elements such as core web vitals. Making their way through the simple SEO theories implementing complicated changes in their blog can be difficult for anyone.

It prioritizes the user experience of a particular blog and lets the algorithm know what type of information is provided on that blog, along with the content serving method.

The core web vitals mainly affects the performance and speed of any blog, which can either increase or decrease your results accordingly.

Let’s see how you can actually analyze, process, and improve the core web vital score for your blog with a positive approach!

What are core web vitals?

There are many people who have never heard about core web vitals, but as a successful blogger, it’s very important to stay updated with the recent trends in the industry.

If you don’t want to get excluded from the list of top results, then consider these core web vitals as most important for upcoming updates in the next few months.

According to the official announcement from Google, the core web vitals are mainly divided into three different parameters.

  • LCP – largest contentful paint
  • FID – First Input Delay
  • CLS – Cumulative Layout Shift

Don’t worry if these elements are completely new for you. As we will be discussing each of them in detail to get a better view of the picture.


The largest contentful paint is an element that refers to the largest chunk of your content. Normally it would be a media file like an image or video, that takes extra time for loading completely. This extra time usually shows the user that the site is loading.


As the name suggests the first input delay is related to the very first interaction a user has made with your blog. It’s the interval time between when a user clicks a specific element like button, link, etc, and how much time your blog takes to respond to that request.


It may sound too complicated to most people, but Cumulative Layout Shift is simply focused on layout optimization. When a user interacts with a different element of layouts on a specific web page of your blog.

The CLS notices the change/shift in the layouts and designates a score from zero to a positive number. You need to fix the layout if you are getting a higher score from CLS.

Why Core web vitals are important for SEO?

Because, before this important update, the majority of bloggers used to ignore them.

Thankfully the May 2021 update from Google has made core web vitals to be considered as the second most important ranking factor for any blog.

So after getting a boost of importance from Google core web vital improvements are trending at the moment. Yet most of them are having a hard time performing necessary changes.

As the core web vitals are directly connected to the performance and user experience of your blog, it can get exhausting if you are not familiar with making such changes.

Because if you have a decent web vital score, your blog can deliver a smooth and effective performance along with the best possible user experience!

How you can improve your core web vital score in 2021?

Now coming to the main issue, after analyzing your site’s web vital score we’ll look on the bright side and start updating anything that requires enough attention.

Because if you want to survive the upcoming May 2021 update from Google. Then fixing your core web vitals score is mandatory.

And to make that happen you have to understand the current status of your blog’s performance and user experience while following the below steps carefully!

1. Improve the blog security

Security comes first whether you are talking about a blog or any other service. Because everyone is concerned about their privacy and security in 2021.

So if you fail to provide your content/service in a secure environment for the readers, your web vital scores are going to tremble for sure.

Thankfully you can use secure protocols like HTTPS that are available for free. In addition to that, you can use security plugins such as JetPack or Wordfence if you are a WordPress user.

In short, improving the security of your site will help you improve the performance and user experience.

2. Optimize your media files

Another important factor for making your core web vital score stable is to optimize the media files within your blog posts.

Stats such as resolution and size affect the performance of any web page accordingly.

Suppose you are using images and videos of high quality. It will take more space and time to load them on the user side every time someone visits your blog post.

Unless you are using a powerful caching plugin like WP3 Cache or WP Total Cache, you may have to face clumsy loading speed for your blog posts each time.

3. Fixing CSS related issues

CSS is responsible for controlling the appearance of your blog and web pages. However, sometimes imperfect CSS can affect the performance in a negative manner.

Ruining your core web vital score, because of critical CSS issues and large files, your blog may take longer than usual to load.

Resulting in poor performance and core web vitals. Yet it’s easy to fix this issue if you are familiar with CSS and fundamental coding.

Don’t worry if you are not aware of CSS working. Because WordPress provides a plugin known as WP Rocket that is easy to install.

Once the installation is complete, try using the Optimize CSS delivery feature and it will automatically fix any CSS-related critical issues that are holding back the performance of your blog.

4. Make your blog mobile-friendly

If you have already optimized your blog according to the recent Mobile-First index update. Then your blog would be already enough mobile-friendly to go with the latest core web vital requirements.

Because the measures taken while following the mobile-first index, are vastly focused on making a blog more mobile-friendly.

So if you can make it work for the mobile-first index then you are good to go!

In case you are a complete beginner without enough fundamental knowledge. We have created a complete step-by-step guide for making your blog mobile-friendly without much effort.

5. Stabilize the loading

The loading speed is considered important, for all of the elements we mentioned before. (LCP, FID, CLS) Affecting these crucial stats that are important for your blog, stabilizing the loading speed to consent is very important.

To achieve a stable loading speed on various devices and platforms. First of all, you may need to check your server performance and quality.

Because if your server is not durable enough to handle tough situations and a huge amount of traffic at peak times, then it can reflect on your core web vital scores.

Server performance depends on many elements like your hosting provider, the version of PHP you are using, how much hardware resources are provided for usage, etc.

It would be best to migrate your blog to better hosting if you are facing poor performance and response issues with your current service provider.

6. Working on third party elements

Third-party elements have a huge effect on the performance and outcome of your efforts.

Because most of the bloggers use WordPress as their first choice. Usage of third-party themes and plugins is very common.

No doubt they are easy to install and use compared to traditional methods, yet sometimes choosing the wrong one can turn you down.

They can directly affect your blog, as most of them work in real-time while serving the content to the user. Ad scripts and related elements should be monitored closely if you want to avoid such issues.

Final words

Google keeps improving the algorithm time by time, but if an update is going to target something huge then bloggers should better prepare themselves.

To tackle such updates and take advantage of the opportunities created by these updates you have to stay updated with the recent trends.

Core web vitals can be considered as the second most important ranking factor at the moment, so you better look out for any upgrades regarding it.

Share this article if you found it useful and don’t forget to mention any suggestions or queries you have in the comments section below.

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