What is eliminating render blocking JS – CSS above the fold?
This simply means that a webpage will render (load) a lot faster without waiting for the browser to call on the JS and CSS files while rendering the top of a page. Top search engines including Google want to see the top visible part of a web page (above the fold) display the content without waiting for the render blocking JS and CSS to load. To much JS and CSS above the fold can negatively affect page loading speed and search engine positions. It may also affect the user satisfaction and engagement as a user may leave a website if it takes to long to display the content.
How to eliminate JS – CSS above the fold?
SEO impact of eliminating JS – CSS above the fold