Distribution of Will grants the Hive Mind the ability to begin spreading its dreadful influence further afield. The ability to dominate the population if a constant strain of the Hive Queen and the further those minions are from the Hive Cluster, the more difficult it is. This technology allows the Culture to build Nerve Relays, an infrastructure Connector that allows the spread of the domination and allows the Hive to grow, consuming more resources and growing much larger.