A "Quad Monitor" setup refers to the use of four computer monitors connected to a single computer system. This configuration allows users to expand their workspace significantly, making it easier to multitask and manage multiple applications simultaneously. It is commonly used in fields such as graphic design, video editing, and financial trading, where having more screen real estate can enhance productivity. To set up a quad monitor system, users typically require a compatible graphics card that supports multiple displays. Additionally, they may need specific cables and adapters to connect the monitors. This setup can improve workflow efficiency by providing a broader view of data and applications, reducing the need to switch between windows.