Once you have created pop-up windows, you can share and embed your Web map or use the provided templates to quickly create a Web application that displays the map and pop-up window with no programming required. End-users of the application can click on the map to display the information pop-up. View the Building Web applications with the ArcGIS.com templates help topic for information on creating and sharing a Web map.
The Popup class, an implementation of InfoWindow provides the following capabilities:
View the Feature layer from feature collection and Feature Layer with popup samples for examples of how to work the popup.
At version 2.4 the MobilePopup class was added to provide a better user experience when working with small maps such as maps that display on a mobile device. It provides an info window with a small footprint when a feature is initially touched. Once open, the info window has a button to fill the screen with the feature's attributes so all info about a feature can be seen. We use the mobile popup viewer in the ArcGIS.com mobile site. Visit ArcGIS.com from a mobile device or navigate directly to the mobile site m.arcgis.com to try out the mobile popup.