From Brotato Wiki
Community Support is an in-game item that can be bought from Shop or can be found in a Crate. Most Items increase the Stats of the player while some of them provide unique effects.
Community Support is a powerful item that allows you to trade some of your defense into offense, similar to Glass Cannon. Community Support requires a significant amount of enemies to be on the map for it to be efficient for its high cost. But the strength of the item is that if you ever fall behind, it becomes stronger and helps you deal with the enemies. This is particularly useful when dealing with Horde waves or waves with large amounts of enemies, such as wave 9.