A professional conference system will allow you to control a meeting and stop it descending into a shouting match where the loudest person often wins. Meetings are normally put in place to debate or resolve matters and a controlled agenda allows the meeting to run smoothly and hopefully finish on time.
Essentially a conference system allows many delegates to have a discussion in a large space by providing a microphone and compact loudspeaker at each delegate position. The meeting is normally controlled by a chairperson that has a slightly more advanced microphone unit allowing mute and override facilities to control the delegates ability to speak.
Large systems are often linked to a PC that can offer further control including how many microphones can be used at once and often includes voting facilities to track and record the outcome of any matter that needs a majority decision to progress. The outcome of the voting process can be stored and recorded with the results normally being shown on large screens.