The Spanish Football League, officially known as La Liga, is the top professional football division in Spain. Founded in 1929, it features 20 teams competing annually for the championship title. The league operates on a system of promotion and relegation with the Segunda División, the second tier of Spanish football. La Liga is renowned for its high level of competition and has produced some of the world's best football clubs, including FC Barcelona and Real Madrid. The league attracts top talent from around the globe, making it one of the most popular and watched football leagues worldwide.