What does LOD Group "Vista" stands for?

Inside the Static Mesh Settings panel i can assign “Vista”.

What kind of meshes should be assigned Vista? What does it mean?

Also what is the group “Deco” scope, decorations?

Thanks

This should help you:

Vista is defined as a view or prospect, especially one seen through a long, narrow avenue or passage, as between rows of trees or houses. It is a LOD group meant to define the meshes within it, like foliage defines just that foliage, the names there are just the ones setup by default and you can change them by editing Engine.ini file in the section: [StaticMeshLODSettings]

Hope this helps.