If this is a preview mappack, it goes in Gallery.
If this is a mappack made for Blockland users to download, it belongs in Maps.
If this is maps you created for the game Call of Duty Black Ops, it belongs in Games or Off-Topic.
If this is a selection of builds you made for Blockland for users to download, it belongs here or in Gallery with a link.
If this is anything else, press 5.