"Progressive web app" (PWA) refers to an approach that combines the best of web and mobile applications, offering a seamless user experience. PWAs are designed to work on any device with a web browser, providing offline functionality, fast loading times, and an app-like experience without the need for installation through app stores. They leverage modern web capabilities to enhance user engagement and retention by providing features like push notifications and home screen installation. This makes PWAs a versatile solution for businesses looking to reach a wider audience without the overhead of maintaining separate native apps.