Enterprise Application Integration (EAI) refers to the process of connecting different software applications within an organization to work together seamlessly. This integration allows data and processes to flow between systems, improving efficiency and reducing the need for manual data entry. EAI can involve various methods, including middleware, APIs, and data integration tools. By implementing EAI, businesses can enhance their operational capabilities, streamline workflows, and ensure that all applications are synchronized. This leads to better decision-making and a more cohesive IT environment, ultimately supporting the organization's goals and improving overall productivity.