With Hummingbird’s much anticipated Critical CSS feature, you can expect faster-loading pages and better performing WordPress sites. Here’s why render-blocking resources are now a thing of the past…

If you care about page loading speed (and you should if you want visitors to stay on your website for longer than two seconds), then it’s vitally important to understand how CSS affects site performance and how to speed up your page loading time using an optimization task known as Critical CSS.

In this article, we’ll cover the following topics:

Let’s dive in…

What is Critical CSS and How Does it Improve Performance?

When users arrive on a website, all they can see initially is the content displayed on their screen before scrolling.

This area is referred to as being “above the fold.”