Is the biometric data used in voter identification at polling stations?

United States of America, Mid-Term Congressional Elections 6 November 2018, ODIHR Limited Election Observation Mission [Final Report], accessed 16 February 2019

“Requirements for voter identification vary widely. Thirty-four states required voters to show some form of identification before voting, while in 16 states identification of voters is most often based on verification of signatures or conducted by asking for personal information. The number and type of identification documents accepted for voting purposes differed across states. Seventeen states required photo identification.”

Requirements for voter identification vary widely across the United States. See sources for details.