He's referring to where to put them.
Im having trouble INSTALLING maps ON blockland
(I know I capitalized installing&on)
Where to put your maps? Well if you have RTBv2 then if you download the maps from in-game, then they will be put automaticly in the correct folder.
If you don't have RTB, then you must manually do it. (or if they didn't host it)
go to C:\Program Files\Blockland\Add-Ons and then put the entire file in it. Not all those files that are inside the folder, but the folder itself.
I hoped I helped!