The majority of content on the web is words—and more than half of web browsing happens on mobile screens. It follows then that the way we set our words has a bigger impact than ever on design, usability, and brand differentiation. But while typography is clearly the most important aspect of great design and user experience, it can’t come at the expense of performance or we risk our great designs never being seen. Variable fonts are here, and will change everything: with a single font file that can scale in size, width, weight and even x-height—exactly as the type designer envisioned.