Crafting Rich Experiences with Progressive Enhancement. The web is an ever-changing medium whose scope, application, audience and platform continue to grow on a daily basis. If you’ve worked on the web for any amount of time, you’ve likely heard or even used the term “progressive enhancement.” Since the term’s inception, it has been considered a best practice for approaching web design. But what is it really? And how do we reconcile its meaning with the rapid evolution of the languages and browsers we rely on to do our jobs?