Progressive web apps (PWAs) combine the best features of web and mobile applications. They provide a seamless user experience across devices and browsers, characterized by fast loading times, offline capabilities, and push notifications. PWAs are built using standard web technologies like HTML, CSS, and JavaScript, enabling easy updates without requiring user installations. Their responsive design enhances accessibility, while service workers enable background processes for improved performance. This attributes make PWAs a cost-effective solution for businesses aiming to enhance user engagement.