Progressive Web App / Development Terms Progressive Web App A progressive web app (PWA) is a type of web application that uses modern web technologies to deliver an app-like experience through a standard web browser. PWAs are designed to be fast, reliable and engaging, even in offline or low-connectivity environments. They combine the best features of web and mobile applications, offering users a seamless experience without needing to download an app from an app store. PWAs can be accessed through a URL and installed on a user’s home screen, where they function like native apps. They use service workers to cache content, which supports offline access and faster load times. Features like push notifications, background sync and device hardware access help create an interactive experience. For example, a news organisation might build a PWA that lets users read articles offline, receive real-time alerts and save stories for later. For B2B and SaaS companies, PWAs offer a scalable way to improve user experience, reduce bounce rates and simplify updates without requiring multiple codebases for different platforms. For nonprofits, a PWA can provide access to services, events or resources for users in areas with limited internet access or older devices. PWAs are also cost-effective, as they do not require approval from app stores and are easier to maintain. Optimising for Core Web Vitals, mobile responsiveness and accessibility helps ensure the success of a PWA.