Biometric details are personal identification data collected during the visa application process. For a Schengen visa, this usually includes fingerprints and a digital photograph taken at the visa application center. These details are stored in the Visa Information System (VIS) used by Schengen countries to verify travelers and prevent identity fraud. Biometric data helps confirm the identity of the applicant and improves security in the visa process. Most applicants need to provide biometrics only once every five years unless new information is required.