Core web vitals are Google’s defined set of metrics to measure the users’ experience for browsing a webpage. Google uses these core web vitals to score the website’s UX (user experience). These core web vitals also guide website designers and owners to improve their website UX.

Google’s core web vitals focus on the following three factors to identify the UX for a particular webpage.

• How easy it’s to interact with web elements and content.
• Page loading speed
• Visual stability of a webpage

Web designers must learn about the core web vitals to improve the user experience and send positive optimizing signals to Google. This blog will walk you through Google’s core web vitals.

Google Core Web Vitals

The user experience is one of the critical SEO factors to getting a website on top SERPs. Google core web vitals scores UX for browsing web pages. Web designers need to walk in a layperson’s shoes to comprehend the viewers’ perspective of positive user experience. And they can seek guidance from Google core web vitals for UX web design development or optimization. Google has three core web vitals to score webpage users’ experience as enlisted below,

• LCP (Largest Contentful Paint)
• CLS (Cumulative Layout Shift)
• FID (First Input Delay)

Google considers these three core web vitals and a few other factors like mobile-friendly design, Intrusive Interstitials, HTTP, and safe browsing experience for the “safe browsing experience” signal. One needs to work on these three core web vitals and other discussed factors to send the “safe browsing experience” signal to Google.

Largest Contentful Paint

It is one of the three core web vitals; it indicates how speedily the main content of a web page gets loaded. It enables website owners or SEO experts to assess the user experience of a web page by looking at the timescale to load its main block.

The largest contentful paint measures the time from when a user starts the webpage loading process to its main block complete loading. LCP measures the time for the following elements,

• Block Level Text
• Images
• Background graphics
• Video poster images

Google recommends achieving an LCP of 2.5 sec or less for at least 75% of the web traffic. If your website has an LCP of more than 2.5 seconds, you need to optimize the LCP to improve the user experience and send positive optimizing signals to Google. But the question is, how can you optimize the LCP?

LCP optimization is a complex task; One needs to look at multiple factors to optimize the LCP. But, device-friendly web design is the most crucial factor for optimizing the LCP. For instance, a website has a 1000kb high-resolution image for desktop versions; it may have a 100kb image size for the mobile version to reduce the loading time without impacting quality. The device-friendly design optimization will single handily reduce the LCP time by several seconds.

Cumulative Layout Shift

You must have experienced the sudden layout shifting of a webpage while browsing. It irritates the users and causes the worst user experience. Cumulative layout shift is another of Google’s core web vital; it measures the webpage’s sudden layout shift without user interaction. CLS assists web developers and site owners in identifying the links, buttons and images with severe CLS issues. And it ultimately makes the optimization process easier for web developers and designers.

CLS measures the stability of the website elements after loading the web page. You may be wondering how does Google measure the CLS? Google looks at the distance of an element’s sudden move within the viewport to measure the CLS. Distance hints at the intensity of the web page’s instability, and Google uses it for scoring the webpages CLS.

In general, there are the following four kinds of layout shifts. But not all of these impact the CLS score. You may look into it for a better understanding of CLS.

• Intentional Layout Shift – When a user interacts with a button (submit input), the layout shift within half a second does not impact the CLS score. This layout change for the half second is referred to as an intentional layout change.
• Animation or layout shift – CSS-triggered animation or layout shift does not impact the CLS score.
• Layout shift within Viewport – Google only considers the above-the-fold layout shift for the CLS score. Layout shift outside the viewport does not impact the CLS score.
• Webpage Generating Layout Shift – A Layout shift during webpage loading negatively impacts the CLS score.

First Input Delay

Digital web users start interacting with the buttons or links the moment it appears on the screen, whether the webpage is completely loaded or not. And users get frustrated if a webpage does not meet their expectations. Google measures this user experience through FID – a core web vital of Google.

First Input Delay (FID) measures the latency in event processing initiated by the user.

FID does not measure the time taken to process an event, from tapping the button to completing the process. However, it measures the duration a web browser takes to process the event after a user triggers it.

How can you reduce the FID to optimize the UX? You may follow the enlisted tips for optimized FID to improve the UX,

• JavaScript execution time can be one of the primary reasons for your website’s FID issue. Reduce it to an appropriate level.
• Reduce the third-party code to attain an optimized FID score.
• Minimize the main thread work
• Keep the request count low and the transfer size small for scripts, images, etc.

Final Words | What are Google core web vitals?

Google core web vitals enable Google to measure website users’ experience, guiding developers and SEO experts to optimize the UX. Paying attention to the Google core web vitals optimization provides a better UX and improves the website’s SERP ranking.

Keep LCP, CLS, and FID in view while designing the website to optimize the user experience and earn a higher SERP ranking. Take into account the guidelines discussed above to meet Google’s standard for an appropriate UX and make routine audits to keep improving the user experience.