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Progressive Web Apps (PWAs) are the apps which are developed using contemporary web technologies and capabilities. They provide a native app-like experience to its users. Progressive web apps are websites written using Javascript, HTML, and CSS. They work offline and load fast which makes them trustworthy. They are capable of receiving push notifications and can be launched from the home screen. These apps get installed instantaneously. They do not require installation on a device which saves space. It is the most cost-effective of all and written in JavaScript.