The course is designed for people with a variety of mood-related concerns. The concern most often seen in clinics is Major Depressive Disorder, or MDD. We briefly describe the symptoms of this disorder and its division into mild, moderate, and severe subtypes - all of which are actually quite severe. People with milder forms of mood difficulty can also benefit from the strategies described in the course. People with bipolar disorder, however, are especially urged to consult with a caregiver, as the course may be less helpful for them.