Web App is an application that uses the web browser as an interface. The unique thing about Web-app id it can be accessed from any computer or mobile or tablet having an internet connection.
sms in romantic way has several advantages, have a look at them:
Less Costly: Developing a web app is cheaper as it only needs to be designed for a single platform.
Easily Accessible: As it can be accessed from any of the device connected to the internet, it opens doors to a new concept like global teams, working from home, and real-time collaboration.
Increased Security: Web apps are more secured because they are deployed on dedicated servers that are monitored continuously. Web Apps need not monitor each device like that in the case of device apps.
Flexible core technologies: Web App Development can be done using any of the 3 core technologies, Java, DotNet, and SQL.
Easy handling of Workload: If an application requires more power to perform tasks only the server hardware needs to be upgraded.
Easy Installation and Maintenance: Installation and maintenance become easier as the upgrade once installed on the host server users can easily access it.
More user-oriented: Web App developed with the new technologies are more user-centric rather than the technology-centric.