Core Web Vitals: How to Optimize Your Website for Better User Experience and Improved Search Rankings


Core Web Vitals are a set of performance metrics introduced by Google that focus on user experience. They are a crucial part of Google’s search ranking algorithm and have a direct impact on your website’s position in search results. This blog post will guide you through the three main Core Web Vitals – Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS) – and provide actionable tips to optimize your website for better user experience and improved search rankings.

Understanding Core Web Vitals

  • Largest Contentful Paint (LCP): Measures the loading performance of your website, specifically the time it takes for the largest content element (e.g., image or text block) to become visible on the screen. A good LCP score is under 2.5 seconds.
  • First Input Delay (FID): Captures the interactivity and responsiveness of your website, or how long it takes for the browser to respond when a user interacts with your site (e.g., clicking a button or link). A good FID score is under 100 milliseconds.
  • Cumulative Layout Shift (CLS): Quantifies the visual stability of your website by calculating unexpected layout shifts during page loading. A good CLS score is under 0.1.

Optimizing Largest Contentful Paint (LCP)

Core Web Vitals: How to Optimize Your Website for Better User Experience and Improved Search Rankings

To improve LCP, focus on the following areas:

  • Optimize and compress images: Use next-gen image formats like WebP and resize images to their display dimensions. Utilize compression tools like TinyPNG or ImageOptim.
  • Use lazy loading: Implement lazy loading for off-screen images and other resources to prioritize above-the-fold content.
  • Minify and compress CSS and JavaScript: Remove unnecessary whitespace and comments from your code and use tools like Gzip for compression.
  • Leverage browser caching: Set caching headers for static assets to reduce the load time of repeat visits.
  1. Improving First Input Delay (FID)

To optimize FID, consider these tips:

  • Minimize or defer JavaScript: Reduce the amount of JavaScript required for initial page rendering and defer non-critical scripts.
  • Use a fast and reliable hosting provider: A good hosting provider can significantly improve your website’s response time.
  • Optimize server response times: Monitor and improve your Time to First Byte (TTFB) by optimizing server configurations and utilizing CDNs.
  1. Reducing Cumulative Layout Shift (CLS)

To minimize CLS, follow these guidelines:

  • Reserve space for ads and iframes: Allocate fixed dimensions for ads and iframes to prevent unexpected shifts.
  • Use responsive design: Ensure your website adjusts to different screen sizes without causing layout shifts.
  • Set dimensions for images and videos: Specify width and height attributes for media elements to prevent content reflow.
  • Load web fonts asynchronously: Utilize font-display CSS property to prevent content shifts caused by web font loading.


Optimizing your website for Core Web Vitals is essential for delivering a better user experience and improving search rankings. By focusing on LCP, FID, and CLS, you can ensure your website meets Google’s performance standards and stays competitive in the ever-changing digital landscape. Start implementing these best practices today, and monitor your progress using tools like Google PageSpeed Insights or Lighthouse.