In general terms, an agency is a business or organization that acts as a representative or intermediary between two or more parties. An agency can provide a variety of services, including marketing, public relations, sales, or event planning, and typically acts on behalf of a client or principal to achieve specific goals or objectives.

In South Africa, there are many different types of agencies, including advertising agencies, marketing agencies, public relations agencies, governmental and subject-specific agencies. These organizations may work with individuals, businesses, non-profit organizations, or government agencies, and may be involved in a wide range of activities, from developing marketing campaigns and managing public relations, to arranging events and representing causes.

The role and responsibilities of an agency in South Africa can vary depending on the specific services that it provides, and may include research, planning, coordination, and execution of various initiatives or activities. Additionally, an agency may be responsible for managing budgets, negotiating contracts, and communicating with clients, suppliers, or other stakeholders within the ambit of its goals.