Progressive Web Apps (PWA) is a modern way to build applications, including mobile ones. We purely use web technologies and rely on the capabilities and strengths of the Web platform. Now, historically, it was the lack of these capabilities on the Web that caused the boom of the mobile apps, using so-called "native" (platform-specific) development approaches. But times have changed and the web now has new strong capabilities, in many cases equal if not better than what native platforms can offer.