Map Information ('i' icon) includes things such as title, a 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.
From the My Maps page, do a long press on any map, and the information icon ('i') will appear at the top of the screen. Tap on the icon and the information will be displayed.
When viewing a map, simply tap the information icon ('i') located at the top right corner beside the search icon.
The details contained within the Map Info (projection information, size, etc.) can help you determine which coordinate display format is the best to use (e.g. if you see the map is projected in a UTM coordinate system, you can use the Easting and Northing display format). In addition, the size information can help give you an indication of how far in and out you'll be able to zoom on the map. When troubleshooting certain issues, this information may be key to help Technical Support staff resolve the issue.