The Peerage of the United Kingdom is a system of titles and ranks that denote nobility in the UK. It includes various titles such as Duke, Marquess, Earl, Viscount, and Baron. These titles can be hereditary, passed down through generations, or life peerages, which are granted for an individual's lifetime. Members of the peerage often have a seat in the House of Lords, the upper chamber of the Parliament of the United Kingdom. While the influence of the peerage has diminished over time, it still plays a role in British society and ceremonial functions, reflecting the country's historical aristocracy.