The Spanish football league system is a hierarchical structure of interconnected football leagues in Spain. At the top is La Liga, which features the country's best teams, including famous clubs like FC Barcelona and Real Madrid. Below La Liga is the Segunda División, followed by lower divisions such as Segunda División B and Tercera División. Promotion and relegation occur between these divisions, allowing teams to move up or down based on their performance each season. The system is designed to maintain competitive balance and provide opportunities for clubs at all levels to succeed and advance in Spanish football.