Special interest groups are organizations formed by individuals who share common goals or interests, often related to specific issues like environmental protection, healthcare, or education. These groups work to influence public policy and decision-making by advocating for their causes, conducting research, and mobilizing members to engage with lawmakers. These groups can vary in size and scope, ranging from large national organizations to small local coalitions. They often employ strategies such as lobbying, public campaigns, and grassroots efforts to raise awareness and support for their objectives, aiming to shape legislation and public opinion in their favor.