A meeting for giving or recieving information about a specific idea or important matters concerning the attendees. It could be argued that all meetings have this goal and indeed most meetings are dominated by this information function. Clearly there may be good reasons for such meetings but they need to be spelled out to potential attendees and to those in the audience when the meeting takes place.
Meetings take up time and cost a considerable amount of money.
Meetings with the sole purpose of providing information may be valuable but may be considered time wasters and without real value by many.