Couples counseling is sometimes referred to as couples therapy or marriage therapy, but the terms "therapy" and "counseling" are different. Couples therapy addresses a condition such as anxiety or depression of one or both partners and how that condition impacts the relationship.
During relationship/couples therapy, the therapist will try to change the way in which both partners interact with each other. The therapist will also aim to ensure couples are not behaving in a way which may cause any type of harm to the relationship (e.g. psychological, physical or economic harm).