Many students are interested in eventually getting a PhD. The MA is not a necessary stepping stone to a PhD; many students go directly from college to graduate school. But if you have not been a student for a long time, or were not a psychology major, direct admission to a PhD program is not feasible. Even so, getting an MA is not the only route to a PhD program. Your goal is to put together a package that shows you are serious about academic work in psychology and are likely to do well at it. A mixture of courses at the undergraduate and graduate levels can help you demonstrate solid evidence of scholarly and research ability.