Users are so comfortable with mobile apps, they now demand the same experience  from their browser.  Progressive Web App makes this happen 
Bangalore, June 9 2017: Whether you are an Android phone owner downloading apps from Google Play or an iPhone user, doing likewise at Appstore, one thing is common:  the app experience.   Users have become so comfortable downloading and using apps on their phone that it has  become the gold standard of user experience. 
So when they use a mobile browser  they demand the same level of ease that a downloaded app gives them -- and therein lies the rub:   Apps and web browsers are like apples and oranges.  Not easy for one to look like the other ...... until now, that is.
 In 2015, designer Frances Berriman and Google Chrome engineer Alex Russell coined the term "Progressive Web Apps"   for a suite of technologies that promised a "new way to deliver amazing user experiences on the web". A Progressive Web App or PWA  uses modern web capabilities to deliver an app-like user experience. They are  technically regular web pages (or websites) but can appear to the user like traditional applications or (native) mobile applications.
This new application type attempts to combine features offered by most modern browsers with the benefits of mobile experience to describe apps taking advantage of new features supported by modern browsers. (Wikipedia).   By  enhancing your mobile broswer experience  through PWA,  designers are able to ensure these characteristics:
-           Progressive - Work for every user, regardless of browser choice because they’re built with progressive enhancement as a core tenet.
-           Responsive - Fit any form factor: desktop, mobile, tablet, or forms yet to emerge.
-           Connectivity independent - Service workers allow work offline, or on low quality networks.
-           App-like - Feel like an app to the user with app-style interactions and navigation.
-           Fresh - Always up-to-date thanks to the service worker update process.
-           Safe - Served via HTTPS to prevent snooping and ensure content hasn’t been tampered with.
Many leading e-commerce players  whose main business  flows  from users  of their mobile apps, have realised that it helps to enhance their browser versions with PWA. 
The  first  is  the leading  Indian online entertainment ticketing platform, BookMyShow,  which has successfully migrated its existing mobile website to a  new Progressive Web App (PWA). 
See our story on PWA at BookMyShow here