What did you see in the monitoring — resource utilization, application availability, or business metrics?

On monitoring, I usually saw three main types of metrics:

• Resource Utilization: CPU, memory, disk, network — helps understand how efficiently infrastructure resources are used.
• Application Availability: service status, response time, error count — important for assessing stability and operability.
• Business Metrics: number of transactions, conversion rate, revenue — reflect the impact of technical indicators on business.

For example, when service availability drops, you can immediately see an increase in errors and a decrease in business metrics, which helps to react quickly.