Existential psychotherapy focuses on fundamental human experiences like death, freedom, relationships and finding meaning. It views people as responsible for making their own choices and finding their identity. Key influences include Viktor Frankl's logotherapy, Rollo May who applied existential philosophy to therapy, and Irvin Yalom who emphasized concerns with death, freedom, isolation and meaninglessness. Existential therapy aims to help clients through increased self-awareness and by addressing anxiety from confronting human realities rather than eliminating it.