Spiritual direction is "help given by one Christian to another which enables that person to pay attention to God's personal communication to him or her, to respond to this personally communicating God, to grow in intimacy with this God, and to live out the consequences of the relationship." (William A. Barry and William J. Connolly, The Practice of Spiritual Direction)
Spiritual direction focuses on religious experience. It is concerned with a person's actual experience of a relationship with God.
Spiritual direction is about a relationship. The religious experience is not isolated, nor does it consist of extraordinary events. It is what happens in an ongoing relationship between the person and God. Most often this is a relationship that is experienced in prayer.
Spiritual direction is a relationship that is going somewhere. God is leading the person to deeper faith and more generous service. The spiritual director asks not just "what is happening?" but "what is moving forward?"
The real spiritual director is God. God touches the human heart directly. The human spiritual director does not "direct" in the sense of giving advice and solving problems. Rather, the director helps a person respond to God's invitation to a deeper relationship.