La Liga, officially known as the Primera División, is the top professional football division in Spain. Established in 1929, it features 20 teams competing annually for the championship title. Clubs like FC Barcelona and Real Madrid are among the most successful and popular in the league, drawing millions of fans worldwide. The league operates on a system of promotion and relegation with the Segunda División. Each season, the teams play 38 matches, and the top teams qualify for prestigious European competitions like the UEFA Champions League. La Liga is renowned for its high level of play and has produced many legendary players.