Most of the web applications are highly interactive in nature. This means that when there is a change to the data, it should be reflected in the UI instantaneously without any further delay. To add on to this scenario, different users of the application may demand outputs in various formats like excel sheets, bar charts, pie charts, dashboards, and so on, as depicted in the following diagram:
When there is a change in the functionality of a specific application, the user interface of the application should also be able to reflect the changes with the addition of new options like menus, ...