Automattic, founded by the creator of WordPress, has officially launched Jetpack Boost, a free plugin designed to help web pages optimize for Core Web Vitals. This is significant because Core Web Vitals will become a ranking factor in June 2021.
What is Jetpack Boost?
Jetpack Boost is a plugin that offers one-click optimization for Core Web Vitals. Currently, the plugin performs three key functions and plans to expand its capabilities in the future.
Jetpack Boost includes:
- Optimize CSS Loading
- Defer Non-Essential JavaScript
- Lazy Image Loading
1. Optimize CSS Loading
To construct a web page, a browser undergoes a process called "rendering." Cascading Style Sheets (CSS) are instructions that dictate how a browser should display fonts, position elements, and define other visual aspects of a web page.
However, CSS is a render-blocking resource, meaning it can halt the browser from building a web page until the CSS is fully downloaded. Critical CSS refers to the essential code necessary for rendering a functional page view for visitors.
One way to speed up page loading is to embed critical CSS directly within the HTML document, allowing the browser to quickly render the most important parts of the page. This can be done manually by editing the CSS file or automatically through Jetpack Boost.
2. Defer Non-Essential JavaScript
JavaScript is like a little machine that adds interactivity to a web page, such as drop-down menus. While downloading JavaScript, the browser pauses page rendering, making it another render-blocking resource.
To optimize performance, non-critical JavaScript can be deferred and loaded after the essential elements required for initial page interaction are in place. Jetpack Boost helps automate this process, improving the perception of a faster-loading page.
3. Lazy Loading Images
Images are often among the largest files on a web page, significantly impacting load times. However, not all images need to be downloaded immediately. Lazy Loading defers image downloads until the user scrolls to the area where the images are located, thereby enhancing page usability and performance.
Jetpack Boost
Jetpack Boost is an easy-to-use solution recommended for publishers seeking a straightforward way to improve their Core Web Vitals performance.
Jetpack describes it like this:
"Jetpack Boost gives your site the same performance advantages as the world’s leading websites, no developer required."
Jetpack Boost is particularly valuable for businesses without access to skilled developers capable of making complex coding changes.
This is a way for businesses proficient in their field but not in coding to enhance their Core Web Vitals scores.
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The Easiest Way to Improve Your Site’s Performance and SEO
