An entity is a distinct and identifiable object or concept. In the context of the Google Knowledge Graph, an entity is a real-world object or concept that is represented by a unique identifier and a set of attributes. Entities can be people, places, things, events, or ideas.

For example, the entity “Barack Obama” is represented by the unique identifier Q1624134 and the attributes “President of the United States,” “born on August 4, 1961,” and “has two daughters.”

Entities are used to organize and structure information in the Knowledge Graph, and they are essential for providing users with comprehensive and informative search results.