1. Navigate to the My Maps google website located here.
You can edit the layer name, and map name by clicking the vertical ellipsis.
You can also change how the map looks with the Base Map drop-down.
4. Now we can make some markers.
Click on the marker icon
Then click where you want the marker.
Fill out the marker details.
Repeat until all the markers you want for that layer are complete.
5. Once you have all of your markers we can now save the file.