Google Cloud's SIEM and SOAR platform (formerly Chronicle) that ingests and analyzes huge volumes of security logs, detects threats with Google and Mandiant threat intelligence, and automates incident response.
In CDL it appears in security operations (SecOps) questions. Question: correlate security events from many sources to investigate an incident → Google Security Operations. It is the equivalent of Microsoft Sentinel on Azure.
Google Security Operations is a concept that can show up on the exam. Check the full guide to see it in context.