The NASCAR Xfinity Series is a professional stock car racing series in the United States, serving as the second tier of competition under NASCAR. It features a mix of established drivers and up-and-coming talent, providing a platform for drivers to showcase their skills and potentially advance to the top-level NASCAR Cup Series. Races in the Xfinity Series typically take place on weekends, often alongside Cup Series events. The series includes a variety of tracks, from superspeedways to short tracks, and is known for its competitive racing and exciting finishes, making it a popular choice for fans of motorsports.