Psychotherapy is any treatment relying on psychological means for therapeutic results. Because of the interrelationship between mind and body in behavioral health, whether or not an intervention is psychotherapeutic can have more to do with semantics than anything else. Most people use the term “psychotherapy" to mean talk therapy; a clinical relational process that can lead to experiences, insights, and changes that help people with their clinical goals.
Simply put, people grow and heal in relationship. In psychotherapy, the clinical relationship becomes a tool to help people reach their clinical goals.
Here is some general information about psychotherapy from some trusted sources:
By SciShow Psych (2018).
Psychotherapy works, but find what works best for you.