Difference on Map variants?

I don't know what the difference between a normal map, dm version map, and player version map is, any help? (Using the Intro to stormwreck isle maps)
(I Consider the Merrow Attack that's not called a player or dm version but is just blank where it would be called one, a normal map)

Typically the difference is that DM-facing maps include markers or labels indicating where things like combat encounters, traps, and secret doors are, while player-facing maps don't (to avoid giving the players information their characters wouldn't have).

alright thank you for the information!

No problem!