Google PageSpeed Insights

Christian Schreiber

Web Performance Consultant


What is Google PageSpeed Insights?

Google PageSpeed Insights is a free online tool from Google that evaluates the performance of a website in terms of its loading speed and user experience. It analyzes the URL of a page and provides detailed reports on how well the page performs on mobile and desktop devices. The tool gives a score from 0 to 100, with a higher score reflecting better performance.

PageSpeed Insights uses two types of data: Lab data and field data. The lab data is collected in a controlled environment and provides a snapshot of the site’s performance. The field data comes from real user experiences and shows how the site works in practice. Both data sets are essential to obtain a comprehensive picture of website performance.

How does Google PageSpeed Insights work?

Google PageSpeed Insights uses various metrics to evaluate the performance of a page. The most important of these include:

First Contentful Paint (FCP): The time until the first content appears on the screen.
Largest Contentful Paint (LCP): The time until the largest visible content is loaded.
Time to Interactive (TTI): The time until the page is fully interactive.
Cumulative Layout Shift (CLS): A measure of how stable the layout elements are when the page is loaded.
These metrics are summarized in a score, which is displayed in color-coded areas: red for poor, orange for average and green for good performance. PageSpeed Insights also provides specific recommendations on how to improve performance.

Why is Google PageSpeed Insights important?

A fast loading time is crucial for the user experience and can have a direct impact on the bounce rate and conversion rate of a website. According to Google, 53% of mobile users leave a page if it takes longer than three seconds to load.

In addition, loading speed is an important ranking factor in Google’s search engine results. Pages that load faster tend to be ranked higher. By using Google PageSpeed Insights, webmasters can identify problematic areas and make targeted optimizations to improve the performance of their websites.

How to optimize websites based on Google PageSpeed Insights?

What steps help to improve the loading time?

The recommendations from Google PageSpeed Insights cover a wide range of optimization options. Here are some of the most common steps webmasters can take to improve loading times:

How can image optimization influence the loading time?

Images are often the largest elements on a website and can have a significant impact on loading time. Compressing images, converting them to modern formats such as WebP and implementing lazy loading, where images are only loaded when they appear in the user’s field of vision, are effective methods of reducing loading time.

Why is the minimization of JavaScript and CSS important?

Unnecessarily large JavaScript and CSS files can increase the loading time. Minifying these files removes unnecessary characters such as spaces and comments, which reduces the file size. In addition, unnecessary JavaScript and CSS should be removed in order to minimize the amount of code to be loaded.

How does the browser caching strategy help?

Browser caching saves parts of the website in the user’s browser so that less data has to be loaded on future visits. This can significantly reduce the loading time for returning visitors. A longer cache lifetime for static resources such as images, CSS and JavaScript can improve the efficiency of caching.

How does the server response time affect the loading time?

The server response time is the time the server needs to respond to a request. A long response time can slow down the overall loading time of the page. By using fast, reliable servers and optimizing the database queries, the server response time can be reduced.

What are Content Delivery Networks (CDNs) and how can they help?

Content delivery networks (CDNs) distribute the content of a website via a network of servers worldwide. This ensures that users retrieve content from a server that is geographically close to them, which reduces the loading time. CDNs are particularly useful for websites with a global audience.

How does Google PageSpeed Insights influence the user experience?

An optimized website that loads quickly offers a significantly better user experience. Nowadays, users expect websites to load in fractions of a second. Slow loading times can lead to frustration and cause visitors to leave the site.

In addition, high performing websites are given preferential treatment in search engine results, which leads to more organic traffic. A good PageSpeed score is therefore not only crucial for user-friendliness, but also for success in the search engines.

What can be learned from the use of Google PageSpeed Insights?

Google PageSpeed Insights not only provides a detailed overview of the performance of a website, but also concrete suggestions for improvement. These can be used as a guide to make targeted optimizations and increase the overall performance of the site.

By following the recommendations of Google PageSpeed Insights, you can ensure that your website complies with modern web standards and offers users an optimal experience.

How can Google PageSpeed Insights improve your website?

By regularly checking the website with Google PageSpeed Insights, potential performance problems can be identified and rectified at an early stage. This helps to reduce loading time, increase user satisfaction and improve visibility in search engines.


Google PageSpeed Insights is an indispensable tool for any webmaster who wants to improve the performance of their website. With its detailed reports and clear recommendations, it provides a valuable resource for identifying and resolving performance issues. By implementing the suggested optimizations, webmasters can improve the user experience, reduce loading time and increase visibility in search engines. Regular use of Google PageSpeed Insights helps to continuously optimize the website and align it with constantly changing web standards.

More knowledge

What is Magento? Magento is a widely used open source e-commerce platform developed and supported by Adobe. It is known for its flexibility and adaptability, making it suitable for a wide range of online stores, from small to large companies. With a robust architecture, Magento offers retailers the opportunity to


What is Shopware? Shopware is a leading e-commerce platform that has been specially developed for online retail. Originally from Germany, Shopware has established itself worldwide as a flexible and powerful solution for setting up and operating online stores. The platform offers a wide range of functions that support the entire


What is TYPO3? TYPO3 is a widely used, free content management system (CMS) that has been specially developed for professional websites and applications. It was first published in 1998 by Kasper Skårhøj and has since developed into one of the most powerful and flexible CMS on the market. TYPO3 is

Professional optimization of website load time, Google PageSpeed Score and Web Vitals