The NCAA Tournament, also known as "March Madness," is an annual college basketball championship held in the United States. Organized by the National Collegiate Athletic Association (NCAA), it features 68 teams competing in a single-elimination format to determine the national champion. The tournament typically takes place in March and April, attracting millions of viewers and fans. The tournament is divided into four regions, with teams seeded based on their performance during the regular season and conference tournaments. Each region's winner advances to the Final Four, where the last four teams compete for the championship title.