Educational background/short bio, picture (not many and not fancy ones, and the therapist only, I am not interested in their family or social circle), description of their professional interests and specialties (if any), list or short description of therapeutic approach(es) they use. I also like when they have some kind of unique professional background and/or interest and mention it but not extensively. A short publication list if they have any, I like to check it out. Insurance information if relevant. Concise description of all this using clear language. Clean and not flashy, uncomplicated design.