Firebase is a realtime database which is used for communicate with directly from the client. If w are save your JSON language data into the Firebase then the changes info and updates are sent to all clients, web and mobile which are request Firebase data files . In Firebase we can create very faster applications via using Static file hosting, user management, and security rules. All of our JavaScript code will run entirely within a web browser, But Firebase supports many other languages and environments likes Node.js, Objective-C, Java. Firebase also provides a REST API in which we can read and write data from any server without officially supported SDK. Firebase uses an event-driven model to notify us of changes to our data as well as supply the data when it first arrives.