A key feature of progressive web applications (PWAs) is their ability to operate offline, enhancing user experience and accessibility. PWAs use service workers to cache assets and data, allowing users to interact with the application even without an internet connection. This capability ensures that users can access vital functions on the go, similar to native mobile applications, while also being accessible via web browsers. Additionally, PWAs provide fast loading times, push notifications, and the ability to install on home screens, offering a more integrated experience.