The most central community is determined by computing the Graph Distance metrics. Namely, for each node we determine the average of the betweenness and closeness centrality metrics; we can refer to this new metric as the overall centrality measure. Then we determine which community has the highest median value for our overall centrality measure.
The most central community in the network plays an important role in that its nodes are close to (in terms of graph distance) other nodes and in that the most efficient paths through the network tend to pass through these nodes.
When you select this insight, the most central community will be highlighted, and the other nodes/edges will be dimmed. Furthermore, any edges that exist between the nodes in the most central community will be highlighted in gold (edge highlight color). This will help to interpret the layout of the most central community in relation to the rest of the network.