Map Information ('i' icon) includes things such as: title, detailed description of the map, and under 'Advanced Options', the map's projection details. You can access the Map Information from two separate locations: the Map View, and Map List.
When viewing a map, simply tap the information icon ('i') located at the top right corner beside the search icon.
If you are at My Maps, tap 'Edit' and the information icon ('i') will appear to the right of your map. Tap on the icon and the information will be displayed.