Progressive Web Apps (PWAs) are a way for app developers to make browser apps look more like native Windows or mobile applications. They are essentially what a browser app, a desktop app, and a mobile app would look like if they all converged into one, offering a seamless user experience without the typical browser clutter. The other news with Chrome 70 is the inclusion of these apps, which dedicate all available space to design and core features, representing a steady progression in app design that benefits users.