Map-o-Matic allows you to create and save maps. Thereafter, you can load these maps that you (or others) have created. You can also share maps you create with other users of Map-o-Matic.
The maps are not viewable by just anyone, though. Maps created using Map-o-Matic are stored locally (that is to say, they are saved on your computer, not “in the Cloud”). This keeps your data safer. You can opt to share maps you create with others, though.
The locations which are shown on your maps are displayed as numbered “pushpins,” and incorporate whatever description or explanatory information that you have provided about the location. This information is seen when hovering over the pushpins/locations.