Distinguish between what you know and what you are familiar with
There are two verbs in Spanish that translate “to know” in English, similar to what you have observed with our verb “to be”. The two ways of knowing in Spanish are saber and conocer.
The distinction is not so difficult to remember:
Saber → to know a skill, to be aware of some information, to have knowledge about some topic.
Conocer → to know a person, to be familiar with who they are because of a previous physical encounter, or because they are well known and/or famous. Also to know a place because you have been there.
Yo sé patinar. (I know how to skate.)
Tú sabes hablar un poco de español. (You know how to speak a bit of Spanish.)
Nosotros sabemos a qué hora es el partido de fútbol. (We know what time the soccer game is.)
Ellos saben jugar dominó. (They know how to play dominoes.)
Yo conozco a la presidenta de la universidad personalmente. (I know personally the president of the university.)
¿Tú conoces la ciudad de Nueva York? (Do you know/are you familiar with the city of New York?)
Ellos conocen un lugar donde las personas que saben jugar dominó van los domingos. (They are familiar with a place where the people who know how to play dominoes go on Sundays.)