PageSpeed Insights

PageSpeed Insights (PSI) is a web-based tool developed by Google that analyses the performance of web pages and provides actionable recommendations to improve speed and overall user experience. Using both field data from the Chrome User Experience Report and lab data from Lighthouse, PSI offers comprehensive insights into how users experience your website in real-world conditions, as well as potential issues that may affect load time and interactivity.

Key Features:

• Performance Scores:
  PSI assigns a performance score (0–100) based on core metrics such as Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS).

• Core Web Vitals Analysis:
  Offers detailed reports on Google's key performance indicators—LCP, FID (or Interaction to Next Paint), and CLS—which are used in search ranking signals.

• Lab & Field Data:
  Combines simulated data (lab) for consistent testing and real user data (field) from Chrome users to provide a full performance picture.

• Actionable Recommendations:
  Suggests optimisations such as reducing unused JavaScript, deferring offscreen images, improving server response time, and using next-gen image formats.

• Device and Network Testing:
  Allows performance testing on mobile and desktop devices to understand UX across platforms.

• Lighthouse Integration:
  Built on the open-source Lighthouse tool, providing insights on accessibility, best practices, SEO, and more, alongside performance data.

Pricing Plan:
PageSpeed Insights is entirely free to use. All features, reports, and data are accessible at no cost, with no subscriptions or premium upgrades required.

Use Cases:

• Web Developers:
  Identify code-level performance issues and implement speed optimisations.

• SEO Professionals:
  Improve page speed and Core Web Vitals to boost rankings and comply with Google’s performance standards.

• UX/UI Designers:
  Evaluate how performance impacts user experience and adjust designs accordingly.

• Digital Marketers:
  Ensure fast, mobile-optimised pages for better engagement and lower bounce rates.

• Site Owners:
  Quickly assess site performance and get clear direction on how to make it faster.

Who It's For:
PageSpeed Insights is ideal for developers, SEO experts, marketers, and anyone who manages or builds websites. Whether you’re launching a new site or optimising an existing one, PSI provides essential performance metrics and practical guidance to ensure your site meets modern web standards and user expectations.