PubNub Illuminate offers a real-time, no-code solution for detecting and preventing chat flooding and cross-posting spam by enabling automated decisions based on live data. It allows users to instantly detect spam by tracking message frequency and cross-posting behavior, notifying moderators in real time, and automating actions like warnings, mutes, or bans. The setup involves defining and capturing relevant data fields, creating spam metrics with short aggregation windows, setting conditions for detecting spam, and configuring actions to notify moderators. Users can establish decision rules with adjustable thresholds and monitor the system's effectiveness through a dashboard displaying spam metrics and actions taken. The ease of setup allows spam detection and response to be automated quickly, enhancing the moderation of chat environments.