Which of the following best defines what a web app can do in ArcGIS?

A web app in ArcGIS is designed to provide a dynamic user experience by allowing users to interactively engage with geographic data through web maps. This interactivity includes features such as zooming in and out, panning across various map areas, and accessing additional data layers or tools that enhance user understanding and analysis. By utilizing web maps, a web app can display real-time data, facilitate user input, and offer customizable visualizations, making it a powerful tool for those looking to explore geographic information in an engaging manner.

The other options do not capture the full scope of what a web app can accomplish within the ArcGIS framework. For instance, the notion of only viewing static data does not reflect the interactive capabilities that users expect from such applications. Limiting functionality to desktop systems overlooks the mobile and web-based access that enhances usability and accessibility. Similarly, while reporting tools can be a function of some applications, they do not encapsulate the comprehensive capabilities of web apps within ArcGIS that focus on interaction and user engagement with spatial data.