Datadog Cloud SIEM is a solution designed to help security teams identify specific threats to their environment by adding context to their detection rules and log searches with Datadog Reference Tables. These tables enable teams to filter out non-relevant data, keep investigations focused, and detect threats efficiently. By incorporating custom data tables with detection rules, security teams can optimize their rules for fast and accurate signal generation, conduct efficient security investigations on historical logs, and enhance their Cloud SIEM detection rules with the most up-to-date information to identify malicious activity and attacks.