PWAs are modern frontend architectures designed to provide similar user experiences to native iOS, Android, or platform-specific apps. They are built using common web technologies like HTML, CSS, and JavaScript and are intended to run in browsers, be accessed from the web, and installed on users' devices for offline access. As PWAs grow in popularity, they present unique monitoring challenges, including cross-browser testing, service worker performance, and offline experience testing. To address these challenges, developers can use progressive enhancement methodology, feature detection, error tracking, RUM tools, and synthetic testing to monitor PWA compatibility, service worker activity, and cache performance. Additionally, automated testing in CI/CD pipelines can help ensure the reliability and performance of PWAs by detecting regressions and flaky tests.