What is this "Mapsource" anyway?

[Upperyardman]

Greetings,
I have a new 1490, I have updated the built in maps, but I see in this forum references to "Mapsource" but see no explanation on the Garmin site.
Can someone give me a concise explanation or direct me to an oracle, please?

[rayle]

Garmin MapSource provides you with geographic data that can be viewed on your PC and added to the basemap of your compatible Garmin GPS device. With MapSource, you can:

Transfer saved waypoints, routes, and tracks from your GPS device and save them to your PC

Create, view, and edit waypoints, routes, and tracks

Find items, addresses, and Points of Interest included in the map data

Transfer map data, waypoints, routes, and tracks to your GPS device
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Garmin Nuvi 2589, IPad2, RAC 05'

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