The "Viewed" count in the Dashboard indicates the total number of times the survey link has been clicked, essentially functioning as a page view counter. This number increases each time the survey is opened, regardless of whether the participant begins or completes it. In contrast, the "View Email Status" reflects the participant"s most recent activity. It updates to "Viewed" only when the link is opened but no further action is taken. If a participant clicks the survey link multiple times without starting the survey, the Dashboard count will continue to rise, but the email status will remain at "Viewed" unless the participant takes further action.

https://www.questionpro.com/help/participant-statistics-and-response-rates.html