Here is what I would call a particularly informative and clear professor webpage.
Of course, it's not the most important thing (for me, personally, I mostly discovered professors through asking current professors whom to contact). But a lot of PhD students do discover professors to contact through Internet searches, which may be especially relevant for PhD students who might not have as many connections (especially international ones). And maybe a strong professor webpage could also increase the "fit" of the applicants who do decide to contact the professor.