Azure Service Health provides personalized alerts and guidance when Azure service issues affect your resources. It keeps you informed with targeted alerts about service incidents, planned maintenance, and health advisories. Subscribing to its alerts ensures you are quickly notified of any issues that could impact your resources so that you can plan accordingly. Azure Monitor, while useful for gathering data across resources, is not specifically tailored for proactive health notifications about Azure services. Azure Advisor is designed to offer recommendations, not alerts on service health issues. Lastly, the Total Cost of Ownership (TCO) Calculator is relevant for cost estimation rather than service health monitoring.