A small Guide to Core Web Vitals in SEO


What are web vitals?

Web Vitals are quality signals that are significant for providing a good user experience on the web. These signals have been generated by Google for the site owners with accessory tools to measure their metrics. The signal metrics will deliver insights on performance and will help in creating a better understanding of the quality of experience that website visitors usually get.

For the current scenario, Google is initiating Web Vitals to ease the landscape with the most accurate information on basic signals and their metrics. These are being called the Core Web Vitals.

Know more about web vitals by watching this video,[

What are Core Web Vitals?

Core Web Vitals are basically Web Vitals that will apply to all web pages throughout the search engine and are needed to be measured by all website owners. These will be specific signals that Google considers valuable in delivering a great overall user experience.

These Core Web Vitals consist of three distinct facets of page speed and user experience measurements which will cover loading, interactivity, and visual effects. They are known as Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS).

Each of these three Web Vitals will be supplemented with tools to measure them and data will be provided on their respective thresholds. Core Web Vitals will be factors contributing to your website’s overall presence and will be significant measures for Google’s “Page Experience” score.

Learn about about core web vitals by watching this video,

Why are these signals so important?

To improvise on existing user experience signals, Google is introducing Core Web Vitals as a new ranking signal in 2021. The existing page experience signals include Mobile-usability, Safe-browsing, HTTPS security, and ad experience.

It is going to be the most significant fraction of the 2021 Google’s Core Update on Page Experience. It will decide a website’s page experience score and maintain its ranking on the SERP.

Core Web Vitals are additional signals that will be core factors for improvising overall browsing over the internet, on browsers and will give users more relevant and engaging results. Google explains, “The page experience signal measures aspects of how users perceive the experience of interacting with a web page. Optimizing for these factors makes the web more delightful for users across all web browsers and surfaces, and helps sites evolve towards user expectations on mobile”

They are something that will be rolled out pretty slowly and will be experimented with, so it is not true that these few signals are an ultimatum for website owners and SEOs. They will be updated every year and are a good way for tracking Google’s EAT experiences.

Where To Find Your Core Web Vitals Metrics?

Core Web Vitals data can be accessed from your Google Search Console account under the “enhancements” section. They will gradually be made available throughout June, July, and August in 2021 and are open for further modifications post their launch. They will be determining page ranking and traffic to your website.

The 3 Important Page Experience Measurements:

Many SEOs and webmasters are already on the front making suitable changes to cope and succeed in this page experience update. The page also added that this adjusted roll-out postponement will “help you continue to make refinements to your website with page experience in mind”.

Here we are going to break down these three Core Web Vitals signals for you to make appropriate arrangements. Let’s see how to improve each one of them:

Largest Contentful Paint (LCP)

LCP is the measure of time from clicking on a link to seeing the majority of the webpage load from the POV of the user. There are other metrics too but LCP is significant to know how users see and interact with your webpage.

This can be any large element like an image, video, or a block-level text element and will give the user a chance to understand that it is actually loading.

Google’s specific LCP guidelines suggest that every page on your site should load LCP within 2.5 seconds.

First Input Delay (FID)

FID is the measure of the time from when a user first interacts with your page to the time when the browser responds to that interaction. For say, when they clicked on a button in the menu or entered their email into a field.
In simpler words, Google will now keep an eye on how long it takes for something to happen on your page. FID is important for pages where user interaction is maximum like an e-commerce website but the minimum for a webpage that is 100% content. The minimum set FID value by Google says it should be around 100 milliseconds.

Some ways to improve FID would be to minimize JavaScript which is essentially everything about user interaction and use a browser cache so it will help in loading your page faster.

Cumulative Layout Shift (CLS)

CLS is the measure of the stability of a webpage and also known as Visual Stability. CLS is considered bad when elements of your page move around while the page is still loading and lets the user click random links by mistake. This adds up to a bad user experience.

The CLS score is cumulative of all individual layout shift scores that ever occurred during the lifespan of the page. This score is zero when the page is at the highest stability and can be a positive number that tells more layout shifts. You can check your page’s CLS by actually interacting with your page like a user and observe any layout shifts which affect the CLS score.

For a visitor, it is difficult to re-visualize the whole page and relocate any links after the page gets finally loaded and stable. This sometimes leads to clicking links by mistake and makes the page experience really poor and irrelevant.

The minimum time specified by Google’s Cumulative Layout Shift (CLS) guidelines is 0.1.

core web vitals

The story behind Google’s Core Page Experience Update:

Google first created the buzz around November last year indicating the rollout in May 2021 but they later made headlines for postponing the launch to mid-June and stretching the complete rollout till August-end.

They further clarified it is a core update so changes will be roiling but need not worry they gave site owners and SEOs more than enough time to get ready for the change. Google’s blog post also mentioned the reason for this delay and three-month spanning rollout that it will also be possible for them to tackle any unforeseen or unintended mishaps.


These signals were always present but are ignored by most of the site owners. Google’s algorithm will shift its focus on these signals because they are benefitting for the overall experience of the search engine, will increase traffic and conversions of individual websites, and will provide a great user experience to the visitors.