What is the difference between prompt table with edit and no edit?

If if specify the option Prompt Table with No Edit. Then prompt table will be available for the user to select the value from. It also provides the flexibility of entering the data which is not present in the prompt table also.

If you select Prompt Table with Edit, then prompt table will be available for the user at the time of data entry and user will not be allowed to enter a value in the field which is not present in the prompt table.