Though the custom maps feature has been out for a bit, you may have forgotten about it or it may all be new for you. Either way this wonderful video shows you how to create your own custom maps and enjoy an awesome feature of this popular Google service.
‘My Maps’ is mentioned in the video above, but is now referred to as ‘My Places’ in Google Maps (as seen below).
There is also a nice interactive tutorial available.
Here is a screenshot of a custom map created by ‘The Straits Times’ that you can view using the link below (if you wish to interact with one ahead of creating your own).
Danger flood spots in Singapore (‘The Straits Times’) [Google Maps]
How to create a “My Map” in Google Maps [YouTube]