Pressure groups are also known as interest groups. These groups are organizations that aim to influence public policies and decisions made by governments, corporations, or other institutions. They do so by exerting pressure on decision-makers through various means, such as lobbying, public demonstrations, and media campaigns. Pressure groups typically represent a specific interest or issue, such as environmental protection, human rights, or business interests. By coming together, they can amplify their voices and try to influence change.