He represented the Bajoran cause to the Federation on several occasions, usually at "symposia or diplomatic soirées". At one symposium, he met Beverly Crusher, who considered him to be a good leader for his people as well as a good dancer.
In fact, Holza had no real influence among Bajorans. Ro Laren described him as the "token Bajoran" invited to such conferences to give a good picture, but the real power lay with other, not so sustained leaders like Keeve Falor or Orta. (TNG: "Ensign Ro")