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Render Blocking refers to resources that delay the rendering of a web page, negatively impacting load times.
Render Blocking refers to resources that prevent a web page from being displayed to the user until those resources are fully loaded. Common render-blocking resources include CSS files and JavaScript scripts that are required for the initial rendering of a page. When a browser encounters these resources, it stops rendering the page until they are downloaded and processed, which can lead to longer loading times and a poor user experience.
To mitigate render-blocking issues, webmasters can employ techniques such as asynchronous loading for JavaScript and using the media attribute for CSS files. These techniques allow the browser to continue rendering the page while the resources are being fetched, significantly improving load times and user experience.
Reducing render-blocking resources is critical for SEO, as search engines prioritize fast-loading pages. A page that loads quickly not only improves user experience but also enhances the likelihood of higher search rankings.
For instance, placing a JavaScript file at the end of the HTML document or using the async attribute in the script tag like <script src='script.js' async></script> can help reduce render-blocking.
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