The NASCAR Cup Series is the premier division of professional stock car racing in the United States, sanctioned by the National Association for Stock Car Auto Racing (NASCAR). Featuring high-speed oval track races, the series showcases intense competition between drivers piloting purpose-built stock cars. The season culminates in a playoff system known as the "NASCAR Playoffs," where the top drivers battle for the championship title. Renowned for its passionate fanbase and iconic tracks, the NASCAR Cup Series remains a cornerstone of American motorsports.