Firebase is a suite of cloud-based services designed to satisfy common developer needs. Known as a BaaS (Back-end as a Service) you get all the benefits of a back-end without the complications of setting one up from scratch. Once you learn how to leverage its services, you are going to exponentially decrease development time.
Firebase is a fully managed backend service that gives you best-in-class infrastructure for your web apps, handling everything from user authentication and server scaling, right through to crash analytics and a reliable testing environment. Just set it and forget it. Backed by Google and used by some of the top apps available, you can trust Firebase to work flawlessly every time.
This SlideShare explores the concept of building web apps using Firebase, in brief.