What are the implications of the title of Pinter's play The Caretaker?

The idea of a “caretaker” can be understood on several levels. After Aston helps Davies escape from a brawl and brings him home, he suggests that the down-and-out man could work as the caretaker of the apartment building where he lives. However, it is Mick, not Aston, who owns the building, so Aston’s suggestion was unrealistic. Although Davies agrees in principle, he is both unqualified and unwilling to do such a job. There is also the family perspective, in which Mick seems to be the more responsible brother of the two; as such, he functions as the caretaker of Aston, who had been hospitalized because of his mental illness. More generally, the term can be applied to a cautionary approach, as the characters are all careless in some ways: they have not taken care of themselves, and Aston has not been careful in dealing with a stranger, Davies. “To take care of” can also mean to solve a problem, which the brothers do by evicting Davies at the end.