Mobile Friendly. Mobile Ready. Mobile Optimized. These words get thrown around a lot when talking about web design, with little or no explanation as to what the words really mean. That's because they are basically buzzwords designed to sell web design services. Google any of these terms and you'll find many explanations provided by articles and blogs like this one, but not many clear definitions. Web designers typically use words like these to describe a website that works better on mobile than it did before.