Can anyone break this code down for me?

[GRAHAMV2]

I have this code that I got from someone else and would like help understanding it line by line. Although I know what it does when I run it, I'd like to understand it broken down.

The code is as follows:

Sub AddRow()

'
' AddRow Macro
'
' Keyboard Shortcut: Ctrl+r
'
    Range("A2").Select
    ActiveSheet.Unprotect 
    Selection.ListObject.ListRows.Add AlwaysInsert:=True
    Selection.End(xlDown).Select
    ActiveSheet.Protect DrawingObjects:=True, Contents:=True, Scenarios:=True _
        , AllowInsertingRows:=True, AllowDeletingRows:=True, AllowFiltering:=True

End Sub