Show Permission

[CaptainAwesome]

While looking and editing the Nav bar, i came across:

This determines which variable(s) in the vBulletin $show array will be used to decide if the element should be displayed. For instance 'member' means it will only display if $show['member'] is true. Multiple variables can be specified by joining them with a dot. All of them must then be true for the element to display.

Does this mean i could limit who sees the articles/blog based on their user group? And if so, does that mean only they can see the button or could everyone see it but just not access the content?

Thanks