Google Cloud Platform (GCP) monitoring refers to tracking and analyzing the performance, availability, and security of applications, Google Cloud services and infrastructure hosted on the Google Cloud Platform. It involves using monitoring tools and services to collect, analyze, and visualize data on system behavior, resource usage, and user experience and to alert stakeholders when issues arise. GCP monitoring helps organizations ensure that their cloud-based environments perform optimally, identify and resolve issues quickly, and optimize resource usage to improve operational efficiency and cost-effectiveness.