Some of the personality traits the GD is trying to gauge

Some of the personality traits the GD is trying to gauge may include :-   Ability to work in a team                  Communication skills   Reasoning ability   Leadership skills   Initiative   Assertiveness   Flexibility   Creativity   Ability to think on ones feet

Why GDs:-

The reason why institutes put you through a Group discussion and an interview, after testing your technical and conceptual skills in an exam, is to get to know you as a person and gauge how well you will fit in their institute. The Group discussion tests how you function as a part of a team. As a manager, you will always be working in teams, as a member or as a leader. Therefore how you interact in a team becomes an important criterion for your selection. Managers have to work in a team and get best results out of teamwork. That is the reason why management institutes include GD as a component of the selection procedure.

Company's Perspective:-

Companies conduct group discussion after the written test so as to check on your interactive skills and how good you are at communicating with other people. The GD is to check how you behave, participate and contribute in a group, how much importance do you give to the group objective as well as your own, how well do you listen to viewpoints of others and how open-minded are you in accepting views contrary to your own. The aspects which make up a GD are verbal communication, non-verbal behavior, conformation to norms, decision-making ability and cooperation. You should try to be as true as possible to these aspects.