A node is a fundamental component in many artificial intelligence (AI) systems, particularly those involving graphs or tree structures. In these contexts, a node represents a specific data point or element that can be connected to other nodes via edges or links.
For example, in a recommendation system that uses a graph structure to model the relationships between movies and users, each movie is represented by a node in the graph, and the edges represent the connections between movies and users based on their ratings or viewing history.