Yes, biometric data is required for a Sweden visa. You need to visit the visa application centre in person to provide your fingerprints and a photograph. This process helps verify your identity and is a standard requirement for Schengen visas. If you have given biometrics in the last 5 years for a Schengen visa, you may not need to give them again. However, in most cases, you will need to attend the appointment. Make sure to carry all your documents on the day.