A Mobile-Friendly Test is a tool to help website owners and developers determine
whether their website is optimized for mobile devices. In an increasingly mobile-
centric digital landscape, it's essential for websites to be accessible and user-friendly
on smartphones and tablets.
Google's Mobile-Friendly Test is designed to assess a website's mobile responsiveness and provide feedback on its mobile usability. As Google predominantly uses the mobile version of a site's content, it's important that your website is optimised for mobile usability.