Owners and members
What the person who created a space can do that others cannot.
Spaces are deliberately flat. Almost everything is available to everyone in them, because a group of close friends does not usually need a hierarchy.
The owner
Whoever created the space owns it. The owner can rename the space, change its picture and remove members.
Everyone else
Every member can do everything else: see the map, save places, add moments, send pings and share the invite code.
Removing someone
The owner can remove a member. That person immediately loses access to the map, the places and the activity, and they are not told who removed them.
Anything they added stays. A moment or a place does not disappear because the person who created it left.