Jan 16, 2016
Understanding Critical CSS
by Dean Hume
Critical CSS means the styles for all element which can be seen on the header part on a website, before the user scrolls down the page. This is important because most users wait some seconds before scrolling down, so the content at the bottom has more time to load than the top parts. For better performance and faster loading all critical CSS parts should be placed at top of the stylesheet. For more read the full article at Smashing Magazine:
https://www.smashingmagazine.com/2015/08/understanding-critical-css/