Italian has no everyday verb that works like English to like. Instead it uses piacere — to be pleasing. The thing you like is the subject; the person who likes it is a small pronoun in front.

Mi piace il caffè. — literally the coffee is pleasing to me → I like coffee.

So the verb agrees with the thing, not with you:

One thing / an infinitive	Several things
Mi piace il gelato. — I like ice cream.	Mi piacciono i libri. — I like books.
Mi piace leggere. — I like reading.	Mi piacciono le Cinque Terre. — I like the Cinque Terre.

The pronoun changes with the person who likes:

Who likes?	Pronoun
I	mi piace
you	ti piace
he / she	gli / le piace
we	ci piace
you (plural)	vi piace
they	gli piace (formal: piace loro)

An infinitive always counts as one thing — mi piace leggere e cucinare, never piacciono.