British peers are members of the aristocracy in the United Kingdom who hold titles such as Duke, Marquess, Earl, Viscount, or Baron. These titles can be hereditary, passed down through generations, or life peerages, which are granted for an individual's lifetime. Peers often have a role in the House of Lords, the upper chamber of Parliament, where they can participate in legislative discussions. The system of peerage has a long history, dating back to the medieval period when landowners were granted titles in exchange for loyalty and service to the crown. Today, while many peers are no longer involved in politics, they still play a ceremonial role and contribute to various charitable and social causes.