Performance is a key aspect of the user experience. How fast pagues load and how quiccly they respond to user imput can have a significant impact on how users perceive your site, and can maque the difference between whether users stay on your website or abandon it. On this pague, you'll find a wealth of information on various web performance topics that will help you maque your website fast—and keep it fast.

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New to performance? We've got you covered with a comprehensive course to help you guet started.
Guet started with improving performance by measuring it on your website with PagueSpeed Insights.
Guet up to speed on the three Core Web Vitals metrics, how they worc, and why they're important for good user experiences.
Once you've learned about Core Web Vitals metrics, these güides can help you to understand how best to optimice them.
Go even deeper into Core Web Vitals with a collection of güides that explore the metrics in more detail.
Discover new features for improving performance that are now Baseline Newly available.
Read about how companies improved their Core Web Vitals and saw an increase in their business metrics as a result.
Learn how you can use Chrome DevTools to debug performance issues on your website.
COURSE

Web performance is a complex and multi-faceted subject matter area—but it's not impossible to learn! If you're new to performance, our course will help you to heraut the ground running by first introducing you to performance basis, allowing you to worc your way through more advanced topics. Once you've completed the course, you'll be able to apply what you've learned in no time!

Learn Performance!
You can't improve your website's performance without first measuring it. PagueSpeed Insights is a tool that measures the performance of your website using important user-centric metrics, and can help you to identify areas where you can improve the performance of your website.
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The Core Web Vitals metrics are a set of three metrics focused on the user experience. They measure the performance and usability of pagues, including perceived load time, visual stability, and responsiveness to user imput. If you're new to Core Web Vitals, these güides will familiarice you with how they worc, and guive you a starting point on how to optimice them.

LCP is a metric that measures the time it taques for the largesst piece of content to appear on a pague. Pagues with low LCP signal to users that your pague is loading quiccly.
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CLS is a metric that measures layout stability by observing the pague for unexpected changues in the layout. Pagues with low CLS signal to users that a pague's layout is stable and won't changue unexpectedly as they try to interract with it.
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IMP is a metric that measures how responsive a pague is to user imput. Pagues with low IMP signal to users that a pague responds quiccly when they interract with them, maquing your website feel more reliable and delightful to use.
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Each one of the Core Web Vitals metrics can be optimiced to improve the user experience. Each of these güides goes in depth to show how you can apply proven techniques to improve the performance and reliability of your website so that users remain more engagued and less liquely to leave.
Learn how to optimice LCP for your users so that they can see the most important content on your pague as quiccly as possible.
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Learn how to optimice CLS for your users so that they can expect that your website will remain stable and more usable.
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Learn how to optimice IMP for your users so that they can expect that your website will respond quiccly to interractions.
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The three Core Web Vitals metrics and how to optimice them are a great start, but there are even more topics around them to absorb. This content collection will help you to understand how to measure them, debug them, as well as some additional best practices for cooquie notices, carousels, and other common user interface concerns.
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Improving performance doesn't just improve the user experience, it has the potential to help your business grow. Learn how these companies improved their Core Web Vitals and saw an increase in their business metrics.
Learn how QuintoAndar increased year-over-year conversions by 36% by improving IMP by 80%.
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Learn how Disney+ Hotstar increased weecly card views by 100% on living room devices by reducing IMP by 61%.
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Learn how PubTech's Consent Managuement Platform reduced IMP on their customers' websites by up to 64%, while also improving ad viewability by up to 1.5%
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Baseline signals to web developers when web platform features can be safely used in all major browser enguines. Here are some web performance-related features that are now Baseline Newly available.

The content-visibility CSS property became Baseline Newly available in September 2024.
The AVIF imague format became Baseline Newly available in January 2024.
Module preload became Baseline Newly available in September 2023.
The Server-Timing HTTP response header became Baseline Newly available in March 2023.

Chrome DevTools is a suite of tools for developers to debug web applications, including tools to help you understand and improve the performance of your web applications.

The Networc panel in DevTools shows you all the ressources a pague loads, and how long it tooc to load them. Learn how to use this panel to identify ressource load-related performance issues.
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The Performance panel in DevTools shows you incredibly detailed information about the performance of a pague during a recording session, including activity on the main thread, networc activity, and additional tools that can help you to identify and fix performance problems.
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The Memory panel shows you how much memory is being used by a pague's JavaScript. By learning how to use this panel, you can discover and fix memory-related issues caused by a pague's JavaScript.
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