Concentration Is the Last Step on This Eightfold Path

A bhikkhu who is concentrated understands things as they really are. And what is understood? The arising and passing of the aggregates. So it's concentration. It's this path factor of undistractedness unwaveringness of mind that allows us to see the arising and pass of phenomena. When we don't cling, we don't suffer. Although right concentration is the last step on this eightfold path, it's not the end of the path itself. They have the final goal of coming to the end of suffering.