It was back in 1992 that they announced the appointment of these helpers. They were to assist the GB and be from the “other sheep “ They were likened to the non Israelites who did menial work to help the priests at the Temple.
I don’t know exactly what they do perhaps research articles? Or make low grade decisions on matters……..
We have seen some of them doing monthly broadcasts and one or two have made their way into the GB when a new member was required, so it is an excellent launching pad. (They seem to suddenly get the “upward call” when in that position)