Hockey on grass is a team sport where two teams of 11 players use sticks to hit a ball into the opposing team's goal. The objective is to score more goals than the other team within the allotted time. The document discusses why the author likes hockey, naming their favorite player Dani de Alba and describing it as a fast-paced and exciting game that involves using hockey sticks to hit a ball into the goal. Photos are included of hockey teams in Sevilla.