In Spanish we use the verb ser followed by the preposition para to indicate a purpose. Have a look and listen to these examples:
Este aparato es para medir la velocidad.
This gadget is for measuring speed.
El microondas es para recalentar comida.
The microwave is for reheating food.
Para is also used with other verbs to indicate a purpose.
See also: Using para (and not por) for purpose, goal or objective
