Display a message box during If loop condition meets

[Jimmy1709]

I am learning VBA. I have a following code, in line 6 if the condition meets, I want the excel to display pop up window mentioning the value of cells(x,4) along with highlighting it in Red. If there are multiple items which meet this condition then its fine if it display one message box for each condition met.

I tried msgbox " cells(x,4) & is a best ship date " but its not pulling the value of cell.

Sub test()
     Dim lRow As Long
    Dim x As Long
    
    lRow = Cells(Rows.Count, 5).End(xlUp).Row
    
    For x = 2 To lRow
        If Cells(x, 4) = "Best Ship Date" Then
            Cells(x, 6).Interior.Color = vbRed
        ElseIf Cells(x, 6) >= Cells(x, 5) Then
            Cells(x, 6).Interior.Color = vbGreen
        Else
            Cells(x, 6).Interior.Color = vbYellow
        End If
    Next x
End Sub