Articles in the Vital list have their assessments labelled as:
Featured articles
Former featured articles
A-class articles
Good articles
Delisted good articles
Failed good article nominees
B-class articles
C-class articles
Start-class articles
Stub-class articles
List-class articles
Unassessed articles
The progress bar is auto-updated via category count, and the symbols and article counts are updated daily by User:cewbot. Please read the FAQ before modifying the article list.