Biometric passport is just like a normal passport, but with a biometric chip integrated in it. In biometric passport, the biometric chip is added either at the middle page of the passport book, or at the back or front cover page.
Biometric passport helps immigration department identify travellers on the basis of their biometric identification. Since the identification is based on biometric attributes of a person, the identification process that involves biometric passport is considered foolproof.
While identifying a person using biometric passport, the biometric attributes of a person are matched with the ones that are registered with the biometric chip integrated in biometric passport.