Colour meanings in the table view

Hi Team

I attach a screenshot, why on the table view is there certain response rows with a white background, and most responses in a grey background?

John

Hi there,

Thank you for reaching Support.

The whites are your "Read" entries, and the grays are the "Unread" entries.

You can toggle the status here:

Should you have any further inquiries, we will be more than happy to help.