The Anti-bot feature is designed to block Command and Control (C&C) traffic from hosts that have been identified as infected. This means that if a device in the network is compromised and is trying to communicate with a malicious server to receive commands or send data, the Anti-bot feature will block this communication to prevent further harm and control from the attacker. This is crucial in mitigating the effects of malware that has already infected a system by cutting off its communication with its control server.