Age plus concern is the shape of nearly every parent search: not talking at two, hard to understand at four, stammering at six. Each is a page, each has real volume, and each is written for almost nowhere.
Looking privately is itself a search, and it comes with urgency attached. A family typing it has already decided not to wait, so being clear about availability matters more than being persuasive.
Families working to a date need reports for school meetings and support plans. They know what they need, and a page that names it converts without any persuasion at all.
Adult work is a second market hiding in plain sight. Rehabilitation after a stroke, the teacher who has lost her voice by half term, adults who stammer: real demand, and hardly any local practice writes a word about it.