"magnet for attracting the public" and a "rallying-centre" for teaching activities.

Purpose and function of the Haziratu'l-Quds is to facilitate the spread of the Faith by enhancing its prestige, and acting as a "magnet for attracting the public" and a "rallying-centre" for teaching activities.

http://bahai-library.com/compilation_functions_importance_hazirat-quds