Roughly 60% of all internet users, and by extension your website visitors, are mobile users. If you want to give them a smooth and pleasant experience on your website, then you have to design your website for a host of devices including smartphones, tablets, and also computers. Your webpages should be responsive and not inconvenient or clumsy to use. The Mobile-Friendly Test gives you a good idea of how your website looks on a smartphone screen and a tablet screen. However, you should remember that this tool provides you just a taste of the reality. There are thousands of smart devices, each with their own screen size and shape. Make sure that your website is optimized for as many screen sizes as possible.