Google PageSpeed Insights: What It Is & How to Boost Score

May 30, 2025

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Web Development

In the digital age, the success of a website hinges on one critical factor—speed. Users expect pages to load quickly, whether they’re browsing on desktop or mobile. If your website is slow, users won’t wait—they’ll leave. That’s why tools like Google PageSpeed Insights have become essential in the toolkit of every business owner and web developer.

Not only does Google PageSpeed Insights measure your site’s performance, but it also provides actionable insights to make your website faster.

This blog breaks down how website speed tools work, why website speed matters, and how professional website development services, particularly those offered by web development companies in Melbourne and across Australia, can help develop fast, high-performing websites.

What Is Google PageSpeed Insights?

Google PageSpeed Insights is a free tool from Google that evaluates your website’s performance on both desktop and mobile devices. It delivers a score out of 100, combining lab data from simulated tests and real-world user data to give a comprehensive overview.

The tool evaluates essential aspects of site performance like loading speed, responsiveness, and visual stability. More importantly, it provides specific suggestions for improvements to your website.

In a competitive digital space, knowing how your site performs isn’t optional—it’s essential. A poor score can signal negative user experience, missed opportunities, and lower visibility on search engines.

Why Page Speed Matters? 

Your website’s speed impacts more than just loading times. It influences your entire digital presence, including:

1. User Experience and Engagement

According to user expectations, web pages should load in two to three seconds. Delays beyond this threshold often lead to higher bounce rates, as users are less likely to stay on a slow-loading site. A quick website facilitates easier navigation, which increases user engagement and conversions.

2. Search Engine Rankings

One of the ranking variables that Google takes into account is page speed. It may be more difficult for potential clients to locate you if your website loads slowly, since search engines can penalise it by placing it lower in the results.

3. Mobile-First Indexing

Google gives mobile page performance a priority since mobile devices account for over half of all internet traffic worldwide. Your rankings and reach will suffer from a sluggish mobile experience.

By improving your Google PageSpeed Insights score, you’re investing in better visibility, improved UX, and stronger business outcomes.

How Google PageSpeed Insights Works?

Google PageSpeed Insights uses two types of performance data:

  • Lab Data: Collected in a controlled environment using a simulated device and network.

  • Field Data: Based on real-world user experiences gathered from Chrome browser users.

The tool evaluates your website using Core Web Vitals, which include:

  • Largest Contentful Paint (LCP) – Measures loading performance.

  • First Input Delay (FID) – Measures interactivity (being phased out).

  • Interaction to Next Paint (INP) – Now a key metric that measures overall responsiveness to user interactions.

  • Cumulative Layout Shift (CLS) – Measures visual stability.

In addition to Core Web Vitals, PageSpeed Insights also reports other important metrics like:

  • Time to Interactive (TTI)

  • Speed Index

  • First Contentful Paint (FCP)

The tool offers a list of optimisation opportunities, helping you identify and address performance issues to improve user experience and site speed.

Key Factors That Affect PageSpeed Score

Even well-designed websites can underperform if technical elements are not optimised. Here are the most common issues that can hurt your Google PageSpeed Insights score:

  • Large or Uncompressed Images: Oversized images increase loading time drastically.

  • Unused CSS and JavaScript: Extra code can block rendering and delay interactivity.

  • Slow Server Response Times: When your server takes too long to respond, users are left waiting.

  • Render-Blocking Resources: CSS and JavaScript that load before content can slow down how quickly pages appear.

  • No Caching or Lazy Loading: Without these techniques, every page load requires re-downloading all elements, slowing performance.

Resolving these issues can significantly improve the score and enhance the overall user experience.

How to Improve Your Google PageSpeed Insights Score?

There are several effective strategies to improve your performance score and overall site speed:

1. Compress and Optimise Images

Use tools like TinyPNG or convert files to WebP format to reduce image size without sacrificing quality.

2. Minify CSS, JavaScript, and HTML

Remove unnecessary characters and white space to reduce file sizes. Tools like UglifyJS or CSSNano can help.

3. Enable Browser Caching

Store static content in users’ browsers so they don’t have to reload it every time they visit your site.

4. Implement Lazy Loading

Load images and videos only when they appear on the user’s screen instead of loading everything at once.

5. Use a Content Delivery Network (CDN)

A CDN stores copies of your site on multiple servers worldwide to reduce load times.

6. Choose Professional Website Development Services

Many technical fixes require expertise. That’s where professional developers come in.

Why Choosing Web Development Services Makes a Difference?

Website speed is crucial for user experience, SEO, and overall business success. A fast, responsive site keeps visitors engaged and drives conversions—something that requires more than just design. It demands technical expertise and strategic development.

Partnering with Digiwhiz, a web development company in Melbourne, delivers custom web solutions with clean code, thorough performance audits, and a deep understanding of market trends. With guaranteed loading speeds of under 3 seconds and the advantage of working with a local team, clients benefit from better communication and ongoing support.

Whether you're creating a new site or improving an existing one, it's best to choose a company that can build a fast, efficient, and future-ready website right from the ground up, without relying on shortcuts.

Take Away 

Google PageSpeed Insights is a powerful tool for evaluating and improving your website’s performance. A high score doesn’t just mean faster load times—it also enhances user experience, increases engagement, and supports stronger search engine rankings.

While there are many techniques to boost your PageSpeed score, such as image compression, code minification, and caching, implementing these optimisations effectively often requires technical expertise and strategic planning. This is where professional web development services become essential.

Partnering with the right team ensures your website is built or optimised with clean code, efficient practices, and a strong emphasis on performance, without sacrificing design or functionality. 

At Digiwhiz, speed, usability, and performance are at the core of every project. A website that not only meets industry standards but consistently exceeds expectations.


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