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A Progressive Web Application is a website that has all the features of a native app. Pinterest and Instagram are among the early adopters of the Progressive Web App technology. Twitter Lite and Spotify are examples of some great services we all use and love that actually have a PWA version. PWA is a web-based app developed using Javascript that runs separately from a user’s browser in the background, allowing features like offline browsing, push notifications and other great features, and providing this native app look and feel.