Explain the script

can someone comments this script for me. line by line.?
I appreciate it.

On Error Resume Next

Dim GroupList
Set fso = CreateObject("Scripting.FileSystemObject")
Set WshShell = CreateObject("WScript.Shell")
Set WshNetwork = WScript.CreateObject("WScript.Network")

GetGroupInfo()

LogonPath = fso.GetParentFolderName(WScript.ScriptFullName)
'**************************************Group Mappings Based on Grouplist.csv*********************************
If fso.FileExists(logonpath&"\Grouplist.csv") Then
   Set grplist = Fso.OpenTextFile(logonpath&"\Grouplist.csv")
   ' make File into an Array
   aGroup = Split(grplist.Readall,vbcrlf)
   For I = 0 to UBound(GroupList) ' Check Every Group Membership the user is in (populated into Grouplist)
      grpname = Grouplist(i)
      For x = 0 to UBound(aGroup) ' Read the entire CSV to make sure all drives are mapped for each Group
         mapline = agroup(x)
         If InStr(LCase(mapline),LCase(grpname)) Then ' If you're in the group
            mapline = Mid(mapline,InStr(mapline,",")+1) ' Remove the GroupName from the line
            Drive = Left(mapline,InStr(mapline,",")-1) ' Extract Drive Letter
            Path = Mid(mapline,InStr(mapline,",")+1) ' Extract the path

            If (fso.DriveExists(drive) <> True) and (Drive<>"!!") Then ' If The Drive is not already mapped
               WshNetwork.MapNetworkDrive drive,path,true ' Map The Drive
               wscript.sleep 1000
            End If

        If Drive = "!!" then
               WSHNetwork.AddWindowsPrinterConnection Path
               wscript.sleep 1000
            end if

         End If
      Next
   Next
End If


Sub GetGroupInfo
Set UserObj = GetObject("WinNT://" & wshNetwork.UserDomain & "/" & WshNetwork.UserName)
Set Groups = UserObj.groups

For Each Group In Groups
GroupCount = GroupCount + 1
Next

ReDim GroupList(GroupCount -1)
i = 0
For Each Group In Groups
GroupList(i) = Group.Name
i = i + 1
Next
End Sub