Most users will choose to display their images (pictures) in the Image Gallery.
This Gallery can be segmented into several "Rooms".
Think of the Gallery as a Photo Album & "Rooms" as Pages within the Album
The number of "Rooms" you create in your website and what you call them is up to you
Which pictures you choose to display in whichever Room is also entirely up to you.
The Gallery Home Page displays one image of your choice from each of the Gallery Rooms.
Clicking on the picture automatically takes you to the appropriate Room.