Core Web Vitals and SEO: What You Need to Know

February 8, 2024
Core Web Vitals | Cover Image

Explanation of Core Web Vitals

Core Web Vitals comprise three specific page speed and user interaction measurements: Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS). LCP measures the load time of the main content on a page, aiming for under 2.5 seconds. FID gauges a page’s interactivity — the time from when a user first interacts with a page to when the browser responds to that interaction, with an ideal measurement being under 100 milliseconds. CLS assesses the visual stability of a page, with a goal of having a score lower than 0.1.

Imagine you’re visiting a new coffee shop. You would expect a short line (LCP), a swift response when you place your order (FID), and certainly not for the barista to move your coffee around randomly as you reach to pick it up (CLS). Core Web Vitals assess similar expectations, but for websites.

Why is Core Web Vitals Important in SEO?

The importance of Core Web Vitals in SEO cannot be overstated. Google has explicitly mentioned these factors play a significant role in a website’s ranking on the search engine results page. This is because these metrics directly contribute to providing a better user experience, which is a primary goal for search engines like Google.

How Core Web Vitals Affects SEO

1. Largest Contentful Paint (LCP): A slow LCP rate can significantly increase the bounce rate, as users tend to abandon a site that takes too long to load. Sites with an LCP of 2.5 seconds or lower are likely to rank better as they provide a faster, more satisfactory user experience.

2. First Input Delay (FID): A delay in page responsiveness can frustrate users, leading to a poor user experience and potentially lower conversion rates. Websites with an FID of 100 milliseconds or lower are rewarded with higher rankings.

3. Cumulative Layout Shift (CLS): High CLS scores may result in users accidentally clicking on the wrong buttons due to unexpected layout shifts. This can decrease user satisfaction and increase bounce rates, negatively affecting a site’s SEO performance.

– A study from Google found that websites that meet the Core Web Vitals thresholds are 24% less likely to have users abandon page loads (Source: Google).
– Research indicates that websites with an FID of under 100 milliseconds achieve 20% lower abandonment rates (Source:”

How Can Alli AI Help with Core Web Vitals?

At Alli AI, we understand the importance of Core Web Vitals in SEO and have developed our tool to help website owners optimize these critical metrics. Our platform provides detailed insights and actionable recommendations to improve your website’s performance concerning LCP, FID, and CLS.

– LCP Improvements: We offer in-depth analysis to identify elements that contribute to slow loading times, providing recommendations such as optimizing image sizes, leveraging browser caching, and eliminating unnecessary third-party scripts.

– Enhancing FID: Alli AI analyzes scripts and third-party integrations that may affect your site’s interactivity. We suggest optimizations like reducing JavaScript execution time and breaking up long tasks to ensure a smoother user interaction.

– Reducing CLS: Our tool helps you identify and fix issues that cause layout shifts, including optimizing font delivery, ensuring images and ads have dimensions, and more stable dynamic content.


What is the best way to measure Core Web Vitals?

You can measure Core Web Vitals using tools like Google’s PageSpeed Insights, Chrome User Experience Report, and Web Vitals Extension. Additionally, Alli AI provides a comprehensive analysis tailored to SEO implications.

Can improving Core Web Vitals guarantee better search rankings?

While improving Core Web Vitals is crucial and can significantly impact your site’s user experience and performance, it’s one of many factors Google uses to determine rankings. However, it’s increasingly becoming a distinguishing factor in competitive niches.

How often should I check my Core Web Vitals?

It’s advisable to regularly monitor your Core Web Vitals, especially after making significant changes to your website. Continuous monitoring will help ensure that you maintain optimal site performance and user experience.


Core Web Vitals represent a fundamental shift towards prioritizing user experience in SEO. As these metrics become increasingly important in Google’s ranking algorithm, it’s essential to leverage tools like Alli AI to measure, monitor, and improve your website’s performance. Optimizing for these factors not only helps in SEO but significantly enhances the user experience, leading to better engagement, higher retention, and ultimately, increased conversions. Start focusing on Core Web Vitals today to future-proof your SEO strategy and stay ahead in the digital space.

February 8, 2024

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