Is "set off" a phrasal verb? What's that mean exactly? Also, can I replace it with "take off" in this context?

Native speaker’s answer
Rebecca
Yes, that's correct. It's a phrasal verb and means to start a journey, or to leave/depart. In this case, "Pedro has set off too early" means that he has started too early. Ex: I'm going to set off in ten minutes. Are you coming with me? Ex: Oliver will set off on his travels in one month.