Which service might you use for alerting in Google Cloud?

Using Cloud Monitoring is essential for alerting in Google Cloud because it is specifically designed to provide observability into your applications and infrastructure. It allows you to collect, visualize, and analyze metrics and logs, while also enabling the creation of alerting policies. With Cloud Monitoring, you can define thresholds for the metrics you care about, and if those thresholds are breached, the service can trigger alerts through multiple notification channels, which may include email, SMS, or integrations with third-party alerting systems.

This service integrates seamlessly with various Google Cloud resources and can help you manage and maintain the health and performance of your services, providing proactive notification about potential issues before they become critical problems. In contrast, Cloud Functions is more oriented towards executing code in response to events, Cloud Pub/Sub is designed for messaging and event-driven architectures, and Cloud Identity focuses on identity and access management rather than monitoring and alerting.