# Introduction to Graphs

a network of vertices connected by edges (Reading time: 3 minutes)

Graphs are used to represent networks. Every node in a graph (called **vertex**) can be connected to other vertices. An example of this is social media: every user is a vertex, that’s connected to other people represented by vertices. **Edges** are the connections between the vertices. In the example below, every circle is a vertex, and every line an edge.

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