A Session is a one-to-one appointment that a therapist has prepared on a set topic, for example a session on managing exam stress. It has a title, a description, a fixed length and a fixed price.
To find one: open a therapist's profile and look under Sessions, or use the Session tab in search.
To book one: tap Book. The booking works like a normal appointment, but the length and price are already set. See How do I schedule an appointment?.
Group sessions are not available.