What is a Progressive Web Application (PWA)?

Progressive Web Application (PWA) is a web application that uses modern web technologies to provide an experience close to native applications. Key features of PWA:

• Responsiveness: works on various devices and screens.
• Offline functionality: thanks to service workers, the app can work without an internet connection.
• Installation on device: users can add PWA to the home screen like a regular app.
• Fast loading and responsiveness: optimized for high performance.
• Security: operates over HTTPS.

Example: a website that caches resources on first visit and then allows use even without network, with the ability to install and receive push notifications.