External data refers to information that is collected and used from sources outside of an organization or system. This data can come from a variety of sources, such as public databases, social media platforms, or third-party providers. It is often used to supplement internal data and provide a broader perspective on a particular topic or issue. External data can be valuable in making informed decisions, identifying trends, and gaining insights into consumer behavior. However, it is important to carefully evaluate and verify the reliability and accuracy of external data before using it for decision-making purposes.