Entity

In the context of search engines and AI systems, an entity is any real-world thing that has a unique, stable identity that can be distinguished from other things. Entities are the nodes in knowledge graphs. A person like Marie Curie is an entity. The Nobel Prize is an entity. Radium is an entity. The University of Paris is an entity. What makes each of them an entity is that they have a consistent, recognized identity that persists across different contexts and sources ... they are not ambiguous, interchangeable concepts. Search engines and AI systems build their understanding of the world from entity graphs: structured maps of what entities exist, what properties they have, and how they relate to each other. When your website, brand, or organization is treated as a well-defined entity by these systems, it is represented more accurately, retrieved more reliably, and trusted more consistently.