Committees are groups formed to make or recommend decisions on specific issues. Key characteristics of committees include having at least two members, dealing with defined problems, and members having authority through voting. Committees can make final decisions or recommend actions. Group behavior in committees encourages participation, conformity to group pressure, and a decision process of acquiring information, forming opinions, and making suggestions. Selecting appropriate members, clearly defining the committee's authority and scope, and having an effective chairman who plans meetings and motivates members are important for an effective committee.