This is the 70th most frequent Spanish word.
les
"Les" is a Spanish indirect object pronoun meaning "to them" or "to you" (plural, formal in some regions).
In this sentence, 'les' functions as an indirect object pronoun, referring to 'my friends' and indicating to whom the gift was given.
Les di un regalo a mis amigos.
I gave a gift to my friends.
Here, 'les' acts as an indirect object pronoun that refers to 'the children', conveying who likes the game.
A los niños les gusta mucho ese juego.
The children really like that game.
In this instance, 'les' serves as an indirect object pronoun indicating the people to whom the story will be told.