A special-interest group is a focused and organized association of individuals who share a common interest, goal, or cause. These groups bring together like-minded people to advocate for specific issues, promote their interests, and influence public policy or decision-making processes. They often conduct research, engage in lobbying efforts, and seek to mobilize support among the broader population. Special-interest groups can represent various sectors such as business, labor unions, environmental organizations, or social advocacy groups, among others. Their activities aim to shape public opinion and influence legislation in order to advance their particular agenda.