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Optimizing Core Web Vitals: A Guide on Tools And SEO Benefits

17 Nov 2023

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Imagine you're browsing on the internet and clicking on a website. It took 20 seconds to load at first, and then the visual elements like buttons, and CTAs, were not aligned properly, making it difficult for you to understand the whole navigation of the website. Sounds irritating, right? It is called poor user experience, which search engine result pages consider to degrade a website's rank. 

Therefore, to make things simple, Google came up with the concept of core web vitals in the year 2020. It is simply a standard utilized by search engines to understand how user-friendly a website is. In this blog, we'll not only be seeing what are core web vitals but will also understand how to improve core web vitals. So, let's start with the guide.

What are Core Web Vitals?

Core web vitals are the top three metrics introduced by Google to help marketers, SEO specialists, website owners, and developers understand the website's performance in terms of search engine result pages.

The three concepts of core web vitals are loading speed, interaction, and the stability of visual elements. Based on these three elements, the websites are rated under three categories that are "good, need to be improved, and poor." Let's get to know about the three core web vitals in detail:

LCP - Largest Contentful Paint 

LCP is a metric for the loading speed of a page that users click. In a world where thousands of content information is available within a few clicks for a user, they won't wait for a page to load for more than five seconds. The ideal page loading speed in accordance with Google's algorithm is anything less than 2.5 seconds. The speed from 2.5 to 4 seconds is considered to be under the category of needs improvement, and anything more than 4 seconds is considered poor.

FID - First Input Delay

The time taken by a web page to act on an action taken by the user like clicking on a link or button is calculated under this metric. This element measures the interactiveness of a website. This core web vital is essential as users leave the website if the whole content of the webpage is properly loaded taking action on it is a slow process.

Google suggests the ideal FID score to be below 100 milliseconds. The score between 100 to 300 milliseconds needs improvement, and a score that goes beyond 300 is considered poor.

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CLS - Cumulative Layout Shift

We've all come across a page where the text keeps on moving anytime a graphic, form, or CTA button appears on the screen. Many times we tend to click on the wrong CTA because of unstable text. This metric focuses on improving the stability of visual elements on the website.

The standard CLS score is 0.1 or less. A score ranging between 0.1 to 0.25 is considered under the head of need improvement, and lastly, more than 0.25 is considered poor.

These are three core web vitals that we saw in detail. Now, as promised, we'll be proceeding to see how to improve core web vitals.

How to Improve Core Web Vitals?

The factors mentioned below will help you to improve the core web vitals of a website, which are the loading speed, interactiveness, and alignment of the website.

Image Optimization

For various websites that are graphically very attractive, the largest elements that take forever to load are images. Optimizing this section of the website can help reduce loading time by a significant number of seconds. There are multiple tools available that compress the size and storage space of an image on the website without majorly compromising the quality of images.

Working on Server Response Time

The logic behind this is simple, the longer a server takes to respond to content enquiry, the more time it'll take to show data on the website on the user's screen. Start with researching your database and how it works. If you've already selected the server, and the response time is not apt., try upgrading your current hosting plan. According to Google's algorithm, the standard response time by a server is less than 600 milliseconds.

Enforcing Lazy Loading

The concept of lazy loading means loading the sections of the website at the same moment when the user scrolls and reaches that section. This way, the web page loading becomes much faster by reducing bandwidth usage and ultimately improving the SEO of the website.

These factors will help in improving the core web vitals effectively.

Essence of Core Web Vitals in Technical SEO

Core web vitals are essential as they shift the technical SEO aspects to the user-centric aspect, which is more important. Let's see what are the significance of core web vitals.

Visual Stability

Calculative Layout Shift evaluates how steadily a webpage loads. Reducing unforeseen changes to content is essential from a technical SEO point of view to ensure a smooth user experience. It is recommended that developers and SEO experts .Prioritize appropriate image and iframe dimensions, guaranteeing that items load steadily to prevent layout instability and enhance CLS scores.


First Input Delay (FID) measures how long it takes a user to engage with a website to determine how responsive it is. For technical SEO purposes, decreasing FID is crucial to raising user engagement. A more responsive and engaging user experience is achieved by using techniques like script optimization, browser caching, and asynchronous loading, all of which improve SEO rankings.

User-Centric Performance Measures

Core Web Vitals moves Technical SEO's emphasis to measures that are more relevant to users. First Input Delay (FID), Cumulative Layout Shift (CLS), and Largest Contentful Paint (LCP) offer perceptions of how visitors utilize and engage with a website. Setting these KPIs as a top priority guarantees that SEO activities are in line with the real user experience, which eventually affects search engine results?

Search Engine Ranking Signals

Google in particular now uses Core Web Vitals as explicit ranking signals. Maintaining or raising search rankings depends on adhering to the requirements established by these vitals as search algorithms change. To ensure websites remain competitive in the digital arena, technical SEO activities should be in line with the optimization of Core Web Vitals to fulfill the constantly changing criteria set by search engines.

Fundamentally, Core Web Vitals have emerged as a pillar in the changing field of Technical SEO, signaling a shift towards a strategy that is more performance-driven and user-focused.

Tools for Optimizing Core Web Vitals

Let's see the top five tools used by SEO marketers to optimize core web vitals.

Google PageSpeed Insights

The tool powered by Google helps in measuring and enhancing the website's performance. The tool successfully identifies issues in LCP, FID, and CLS. Google PageSpeed identifies the problem and offers the solution to marketers to improve the site's speed.


Google's Lighthouse is an open-source tool that may be used independently or as part of Chrome DevTools. It assesses the functionality, SEO, accessibility, and other aspects of a webpage. Lighthouse produces a thorough analysis with practical suggestions for Core Web Vitals optimization, allowing developers to choose priorities and carry out required changes.

Chrome DevTools

An in-browser toolbox that helps developers optimize a website's speed is called Chrome DevTools. It enables real-time testing and debugging with features like performance profiling, network analysis, and Lighthouse integration. Developers can guarantee a seamless and responsive user experience by using Chrome DevTools to find and fix Core Web Vitals-related problems.

Web Vitals Extension

As users navigate a webpage, the Web Vitals Chrome extension provides a real-time view of Core Web Vitals metrics. With the help of this tool, developers can better understand how real people interact with a website and prioritize optimizations that will increase user satisfaction and engagement.


GTmetrix is a feature-rich performance testing tool that evaluates the speed of a website and offers useful suggestions. By including Core Web Vitals measurements in its reports, it enables developers to concentrate on particular areas that require enhancement. With its insights on LCP, FID, and CLS, GTmetrix helps optimize content to satisfy search engine requirements.

Parting Words

To conclude, core web vitals are an essential part of an SEO strategy and are equally taken into account by the Google search engine. Google takes action in favor of core web vitals to ensure each user of the search engine gets a positive experience of browsing. Keep in touch for more information on such trends and essential topics related to the world of digital marketing. Till then, all the best for your future endeavors.

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 fingertips Fingertips

Fingertips is one of India's leading learning platforms, enabling aspirants - working professionals, and students to enhance competitive skills and thrive in their careers. We offer intensive training in areas such as Digital Marketing, Data Science, Business Intelligence, Artificial intelligence, and Machine Learning, among others.

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