Grafana 12 introduces a new feature that allows users to import Prometheus-style alerts and recording rules into Grafana-managed alerts directly through the UI, streamlining the migration process without the need to rewrite existing rules. This functionality enhances compatibility with existing workflows and provides access to Grafana's additional alerting features while preserving the original behavior of Prometheus alerts. Users can easily manage and control the import process, making it easier to transition to Grafana's alerting system.