The View menu > Restore Visibility of Previous Selection command is used in conjunction with the View menu > Make Selected Objects Invisible command.
When the View menu > Make Selected Objects Invisible command is used, the selected portion of the model is removed from the current display window (not from the model). The View menu > Restore Visibility of Previous Selection command is used to redisplay the selected objects in the current display window.
Note: Right clicking anywhere in an active window will display a drop-down menu of commands, including the Restore Visibility of Previous Selection command. Clicking that command is the same as using the View menu > Restore Visibility of Previous Selection command.