Explanation
IT Service Management Connector (ITSMC) allows you to connect Azure to a supported IT Service Management (ITSM) product or service. Azure services like Azure Log Analytics and Azure Monitor provide tools to detect, analyze, and troubleshoot problems with your Azure and non-Azure resources. But the work items related to an issue typically reside in an ITSM product or service. ITSMC provides a bi-directional connection between Azure and ITSM tools to help you resolve issues faster. ITSMC supports connections with the following ITSM tools: ServiceNow, System Center Service Manager, Provance, Cherwell.
Reference:
https://docs.microsoft.com/en-us/azure/azure-monitor/alerts/itsmc-overview