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google core web vitals

The Influence of Core Web Vitals on Your Site's SEO

In the ever-evolving landscape of Search Engine Optimization (SEO), staying ahead of the curve is crucial. One of the latest factors that can significantly influence your website's performance on Google search is Core Web Vitals. These metrics are part of Google's ongoing mission to enhance user experience and can profoundly affect your website's SEO. In this blog post, seobase will delve into the Core Web Vitals, why they matter, and how to improve them to help your website perform better on search engines.

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What Are Google Core Web Vitals?

Google Core Web Vitals are a set of metrics that Google uses to evaluate the user experience quality of a website. These metrics focus on three key aspects: loading performance, interactivity, and visual stability. In 2020, Google announced that Core Web Vitals would become ranking signals, making them a critical part of SEO (Search Engine Optimization). Here's a closer look at each of the three Core Web Vitals:

1. Largest Contentful Paint (LCP)

This metric measures the time a web page's most significant content element (e.g., an image, text block, or video) takes to become fully visible to the user. A faster LCP provides a better user experience because users can interact with the page's main content more quickly. An ideal LCP is less than 2.5 seconds when the page starts loading.

2. First Input Delay (FID)

FID measures the time it takes for a webpage to become interactive, precisely when a user first interacts with your page (such as clicking a link or tapping a button) and when the browser can respond. A lower FID is better, indicating that the page is more responsive. Google recommends aiming for an FID of less than 100 milliseconds.

3. Cumulative Layout Shift (CLS)

CLS gauges the visual stability of a webpage by quantifying how much visible content shifts or moves around during the loading process. Such changes can disorient users and might even result in accidental clicks. A lower CLS score indicates a more stable layout, and Google recommends a CLS score of less than 0.1 for a good user experience.

Each of these metrics serves as a tangible way to measure aspects of user experience, making them essential for web developers and website owners to understand and optimize. By improving these Core Web Vitals, you can offer a better user experience, positively influencing your site's SEO performance. 

how to improve core web vitals

Why Do Core Web Vitals Matter for SEO?

The importance of Core Web Vitals in SEO reflects Google's evolving algorithmic priorities. For years, Google has been signaling that the user experience is becoming more critical in ranking web pages. In May 2020, Google explicitly stated that Core Web Vitals would become ranking signals, directly linking these user experience metrics to SEO. Below are some reasons why Core Web Vitals are essential for your website's SEO performance:

1. User Experience is a Ranking Factor

Google aims to deliver users the most relevant and high-quality results. It does this by continuously refining its algorithm to reward sites with a good user experience. Core Web Vitals are a concrete way to measure this experience, making them integral for any SEO strategy.

2. Influence on Engagement and Conversions

A positive user experience often leads to higher engagement, reduced bounce, and increased conversion rates. When your website performs well on Core Web Vitals metrics, visitors are likelier to stay on your site, explore multiple pages, and complete desired actions like purchasing or signing up for a newsletter.

3. Impact on Google Rankings

Poor Core Web Vitals can negatively impact your site’s position on Google's Search Engine Results Pages (SERPs). Websites that fail to meet the criteria for good Core Web Vitals could find themselves outranked by competitors who have optimized their sites for these metrics.

4. Mobile Experience

With Google's mobile-first indexing, your site's performance on mobile devices is more critical than ever. Core Web Vitals apply to desktop and mobile experiences, meaning a poor mobile score could seriously harm your SEO performance across all devices.

5. Competitive Advantage

Optimizing for Core Web Vitals can give you a competitive edge. As more businesses become aware of these metrics, those prioritizing them earlier will likely see the most benefits. Sites that load faster and offer a better overall user experience are more attractive to users and to Google, which can result in higher organic rankings.

6. Future-Proofing

As Google continues to evolve its algorithms, there's a strong indication that user experience metrics will only gain importance. Investing time and resources into understanding and improving Core Web Vitals now can set your website up for long-term SEO success.

google core web vitals

How to Improve Core Web Vitals

Improving Core Web Vitals is essential for web admins, developers, and SEO professionals. By optimizing for these metrics, you not only improve the user experience but also potentially boost your rankings in Google's Search Engine Results Pages (SERPs). Here are some actionable ways to improve each of the three Core Web Vitals: Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS).

1. Improving Largest Contentful Paint (LCP)

  • Optimize Images

    • Use modern image formats like WebP, which offer better quality at smaller file sizes.
    • Employ lazy loading for images, only loading them as they're about to be displayed.
  • Eliminate Render-Blocking Resources

    • Minimize CSS and JavaScript that blocks the rendering of the page.
    • Use the async or defer attribute for non-essential scripts.
  • Optimize Server Response Times

    • Employ server-side caching.
    • Consider using a Content Delivery Network (CDN) to distribute the load, saving bandwidth and speeding up access for your users.

2. Enhancing First Input Delay (FID)

  • Minimize JavaScript Execution Time

    • Break up long tasks into smaller, asynchronous tasks.
    • Only load the JavaScript needed for the page or view. This technique is often referred to as "code splitting."
  • Optimize CSS and JavaScript

    • Use minification and compression to reduce the file size of CSS and JavaScript files.
    • Employ tree-shaking to eliminate dead code that is not being used.
  • Use a Web Worker

    • Web Workers allow you to run JavaScript in the background. This offloads some of the tasks from the main thread, allowing the browser to stay responsive.

3. Reducing Cumulative Layout Shift (CLS)

  • Specify Image and Video Dimensions

    • Always include width and height attributes for your images and videos to help the browser allocate the correct amount of space while loading.
  • Reserve Space for Ads

    • Reserve space for ad slots rather than letting them push content around when they load. This will reduce unexpected layout shifts.
  • Stabilize Web Fonts

    • Use the font-display: optional or font-display: swap property to minimize layout shifts when web fonts are loaded.
  • Avoid Dynamic Content Above The Fold

    • Avoid inserting new content above existing content, especially when that causes a shift. If unavoidable, try to mitigate the impact by reserving space for such actions.

what are the core web vitals


Core Web Vitals are not just a set of technical jargon but essential metrics that genuinely impact the user experience and, consequently, your website's SEO. Now that you understand the Core Web Vitals and why they are crucial, it's time to assess your website's performance and take actionable steps to improve it.

Improving your website's Core Web Vitals can be a strategic move for staying ahead in the digital world. It's an investment that will pay off in enhanced user experience, higher engagement, and potentially improved search rankings.

By putting your users first and focusing on delivering a superior website experience through optimal Core Web Vitals, you are setting the stage for SEO success.

So, assess, optimize, and climb up those SERPs by paying close attention to your Core Web Vitals. Your users will thank you, and so will Google.

Remember, SEO isn't just about keywords and backlinks anymore; it's about providing value and a great user experience. Start improving your Core Web Vitals today, and watch your website rise in the search rankings.

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