Web & Mobile
A PWA is a web application that uses modern browser APIs to deliver app-like experiences — including offline access, push notifications, and home screen installation — without requiring download from an app store.
PWAs are built with standard web technologies (HTML, CSS, JavaScript) but enhanced with a Service Worker — a background script that caches assets and intercepts network requests to enable offline functionality and fast load times even on poor connections. The Web App Manifest file provides metadata that lets browsers prompt users to add the PWA to their home screen, giving it a full-screen launch experience identical to a native app. For businesses, PWAs offer a significant cost advantage over maintaining separate iOS and Android native apps, as one codebase serves all platforms through the browser. Google, Twitter, and Starbucks have launched PWAs that achieved dramatic improvements in engagement and conversion rates compared to their mobile websites.
Example
A newspaper publisher converts its mobile website into a PWA, enabling readers in low-connectivity areas to read cached articles offline and receive breaking-news push notifications without installing a native app.
Related terms
Frontend
Frontend refers to the client-side layer of a web or mobile application — everything the user sees and interacts with directly, including layout, visual design, navigation, and interactive behaviour rendered in the browser or on the device.
Responsive Design
Responsive design is a web design approach in which layouts and content automatically adapt to fit any screen size — from large desktop monitors to tablets and smartphones — using fluid grids, flexible images, and CSS media queries.
CDN (Content Delivery Network)
A CDN is a globally distributed network of servers that caches and delivers web content — images, CSS, JavaScript, and HTML — from locations geographically close to each user, reducing latency and improving load times.
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