Provisioning notification policies in Grafana Alerting can enhance deployment speed and streamline the notification process by routing alerts using alert labels within a tree structure of nested policies. Users can create or update these policies either through the Grafana UI, configuration files, or an API. While provisioning through configuration files results in non-editable policies in the UI, a workaround exists for API provisioning that keeps policies editable by including an X-Disable-Provenance header. This header allows changes to be made post-provisioning, though it must be included in the initial API request. The process involves retrieving the notification policy tree in JSON format, making necessary modifications, and submitting them via a PUT request. Grafana Alerting supports different platforms, including Grafana OSS, Enterprise, and Cloud, with the latter offering a free tier to get started.