English, maybe?

There is multiple ways of doing this. If you're aware with FTP Filezilla, You can just Drag the world folder into your Server Files. Another way to do this is to Log into your Control Panel, and Click Files > FTP Files (login) and hit the button 'Upload' Make sure before you touch any of the worlds you get Multiverse Core. Once you have Multiverse Core in the server you can do /mv import <name_of_the_file> <world_type>

What I mean by world_type is either Flatland or Normal (Flatland is normal -t flat)
and Normal is just (Normal)

Upload the map via FTP into your root directory(not zipped). Then change the world name in your control panel to the same one of the world you just uploaded.