Web application. A web application is application software that runs on a web server, unlike computer-based software programs that are run locally on the operating system of the device. Web applications are accessed by the user through a web browser with an active network connection.
This article shows you how to add a trailing slash to URL's in Umbraco 8, using IIS URL Rewrite Module, without breaking the Umbraco backend. Forcing one particular URL avoids duplicate content, which is important for SEO.