• Simple: Simple Rule lets you create a single rule. Here, you can configure alerts for a single metric only and set thresholds for multiple severities (critical, major, and minor).
• Composite: Composite Rule lets you combine two or more separate rules using logical operators to further refine your alerts. Here, you can configure alerts for multiple metrics and set threshold for multiple severities (critical, major, and minor) in separate sections and combine those by using the logical operators, such as AND (&&) and OR (||), etc.