I'm not entirely sure what you mean by "suggest". The following code...

Private Sub Worksheet_SelectionChange(ByVal Target As Range)
 If Not Intersect(Target, Range("B:B")) Is Nothing Then
   If Application.Selection.Count = 1 Then
     If Target.Row > 1 And Target = "" Then
       Target.Value = Target.Offset(-1, 0)
     End If
   End If
 End If
End Sub

will place the text from the cell above in the current Column B cell and
leave focus on cell so you can just type in a new value, but there will be
no visible indication (other then the selection indicator) to let you know
the cell contents are copied. If this were a TextBox, I would select all the
text in the TextBox so you would know the entry is pending "approval", but I
don't know how to do this in a cell... and even if I did know how, it would
probably be dependent on the

    Tools/Options/Edit/Edit directly in cell

option being checked.

Target.Row > 1 And Target = ""

Rick