How do you use para in spanish?

Para can have several meanings.

The verb "para" can mean to stop when issued as a command.

Most often, however, para is a preposition. It can mean "by": para mañana means "by tomorrow."

It can mean "for": El libro es para tí means "The book's for you."

It can mean in order to: Fuí para ver La Casa Blanca means "I went (in order) to see the White House."