Чтобы = to, in order to
example:
He took a taxi TO get to the airport. - Он взял такси ЧТОБЫ добраться до аэропорта.
Don't mix up with the word "что бы", when что and бы are separated. In this case, the word has different meaning. In many cases you can translate the word "что бы" as "what would"
example:
WHAT WOULD you do if... ЧТО БЫ ты сделал если....
But there could be more complicated cases when the formula "что бы" = "what would" doesn't work.