An Italian Type D Study Visa is a long-stay national visa for non-EU students pursuing higher education (over 90 days) in Italy, requiring pre-enrollment via Universitaly, submission of attested academic documents, proof of funds/accommodation, and an appointment at the local Italian consulate/VFS center for biometrics and interview, followed by obtaining a Permesso di Soggiorno (residence permit) within 8 days of arrival in Italy.