Answer :
Any association of people or groups, usually formally constituted, that seeks to influence public policy on the basis of one or more common concerns is known as an interest group.
To advance themselves or their goals, all interest groups share the ambition to influence governmental policy. Their objective may be to implement a policy that only benefits members of their group or a interest group specific sector of society (such as government subsidies for farmers) or to accomplish a more general public objective (e.g., improving air quality). By exerting pressure on decision-makers to change the course of policy in their favor, they try to lobby, or advance, their objectives.
Any association of people or groups, usually formally constituted, that seeks to influence public policy on the basis of one or more common concerns is known as an interest group, sometimes known as a special interest group, advocacy group, or pressure group.
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