Help with adding maps

I purchased Ghosts of Saltmarsh. In the first module there is a haunted house. The map is there in the assets but I cant figure out how to add the map so the PC's can move around. 

It should be in your Page tab at the top of the VTT, ready to go with tokens in place.

Bear with me as I'm new to Roll20, under the journal of the VTT I see the map, however when I drag it on the to board it just opens in a window. I've tried making visible to players but that didn't work either. I can't figure out what I'm doing wrong.

The little blue tab in the Page Toolbar. See the wiki here: https://wiki.roll20.net/Main_Page#The_User_Interface

I'm having issues as well. I'm in the middle of a campaign, and purchased 3 Map Packs. They do not show up in the Journal, in the Page Toolbar, or anywhere I can think to look. I have created a new game, thinking that perhaps they didn't want to add onto an existing game, but to no avail. 

Please assist.

Map Packs are usually Add-Ons, and you need to add them to a game from the game's information page, outside of the VTT. See here: https://wiki.roll20.net/How_to_Access_Marketplace_Content#Game_Addons

Thank you SO much! I (like many others) am still getting used to Roll20, and seem to have a bit more to go on the learning curve.

Thanks again!

Thank you everyone for the help I finally figured it out and was able to move forward.