What does a node represent in a graph data structure?

In a graph data structure, a node, also known as a vertex, represents a point of data. Each node can hold information, which may vary depending on the application's requirements, such as user data, character attributes, or specific identifiers. This definition is crucial in understanding how graphs function, as the nodes are the entities being connected and represented in the structure.

On the other hand, relationships between nodes are captured through edges, which are the connections that link the nodes together. Therefore, while connections and relationships are important concepts in graph theory, they do not define what a node is. A node stands alone as a foundational element within the graph, serving as a storage point for data that can be interacted with through edges leading to other nodes. This understanding is vital for comprehending how graphs are utilized in various computational applications, such as social networks or pathways in navigation systems.