Maps follow the movement of a thing over a geographical region. In this widget, you will be able to see the current position of a thing by means of a marker.
Since the widget shows the travel of a thing, the parameter used to configure this widgets has to represent geographical coordinates. Luckily, Omnyvore filters out all the non-geographical parameters from the list, so you can safely choose a suitable parameter.
Remember to select exactly one parameter. Otherwise, you will not be able to save the widget.
Textual (usually short) description for what the map shows. It will be visualised in the widget header.
For an exhaustive list of the widgets you can use in Omnyvore, please refer to the Available widgets subsection.