Thanks. Another question: On the screen above, what does the N.... mean

Thanks. Another question: On the screen above, what does the N.... mean and what does the flag mean ?

Thank you for writing to JotForm support.

First Column on submission page is the New Column. It shows whether the submission is read.

If it is an open envelope that means you have checked (Opened / Clicked) that submission. Closed envelope means it is a new and unread submission.