Explore the concept of Progressive Web Apps (PWAs) in this PHP UK Conference 2017 talk by Rowan Merewood. Learn how to build modern web applications that combine the best practices of web development with advanced features traditionally associated with native apps. Discover techniques for creating fast and secure web apps while progressively implementing offline support, push notifications, and homescreen integration. Gain insights into responsive design, metadata optimization, and improved add-to-homescreen functionality. Examine real-world examples from Alibaba, Siteworx, Housing.com, Flipkart, and The Guardian. Delve into topics such as service workers, caching strategies, push notifications, credential management, and web payments API. Understand the importance of HTTPS, strict transport security, and digital asset links in PWA development. Compare PWAs with native apps and explore their potential to revolutionize web experiences.