This issue notification will be indicated if your site detects URLs containing <link> style sheet elements in <head> that are loaded after the <script> element.
You need to specify all of your site’s CSS resources in the HTML document so that the user’s mobile or desktop browser can detect the tags and send the CSS request as quickly as possible for processing.
If scanners detect scripts before style sheet links, this can delay that timeline and cause the page to display slower for the user. It directly affects the loading speed of the site’s pages.
To learn more about other factors that affect content loading speed on a site, check out this article on the MOZ blog.
What triggers this issue?
How to check the issue?
To check your site for this issue, you need to run a site scan in one of the site SEO audit tools. Once the scan is complete, the report will collect all the critical and non-critical errors that affect the content loading speed on your site.
Check not only the issue but make a full audit to find out and fix your technical SEO.
Watch the video by Moz to learn more about content loading speeds on website pages.
Why is this important?
This issue is critical because it directly affects how fast your site’s pages load. Remember that before a mobile or desktop browser can render your page, it must parse the HTML markup.
During this scanning process, every time the parser sees a script, it requires asynchronously stopping and executing it before parsing the HTML.
How to fix the issue?
CSS is something that can block rendering. It is why the webmaster needs to quickly specify instructions in the browser to optimize the async time until the first rendering.
To ensure that rendering doesn’t take too long, you should specify all relevant CSS instructions as early as possible in the HTML document. Then you should move with the stylesheets above any scripts in <head>.