A confirmed QSO means that both parties (you and the other operator) have uploaded matching logs to LoTW.
The system checks the date, time, frequency, and mode, and if they match within certain tolerances, it confirms the QSO.
This is what counts toward award credit (e.g., DXCC, WAS, VUCC).
So:
Confirmed = Matched and valid in LoTW = Counts for awards.
? Verified QSOs
A verified QSO is typically one that has already been used for award credit, such as a confirmed QSO you've applied toward your DXCC or WAS certificate.
It’s like a step beyond "confirmed" — it's confirmed and officially credited in your award application.
So:
Verified = Confirmed + Used for award credit (and accepted).