You could just use the Find&Replace option (Ctrl+H) and make sure to mark the option for identical cell value.
Or use the code below:
Private Sub Worksheet_Change(ByVal Target As Range)
For Each cell In Range("E2:E" & Range("E1").End(xlDown).Row)
If cell.Value = "Standard" Then cell.Value = "Request for a New Standard Change"
My sincere apologies for the lack of response on my part! I got pulled off this piece of work and had to focus on something else - Covid has us all on our toes! I have inserted an image of what the excel spreadsheet looks like. The highlighted bit comes in as "Standard" and I am having to manually retype this as "Request for a New Standard Change"