StorageGRID supports webhook endpoints as destinations for S3 bucket event notifications. The purpose is to allow external applications, automation systems, or data-processing workflows to react when configured S3 events occur, such as object creation or deletion. NetApp documents that a tenant can configure an external or locally hosted webhook endpoint that accepts HTTP POST notification requests. Platform-service messages are generated from StorageGRID and delivered to the configured endpoint, enabling event-driven application integration.

This makes B the correct answer. For example, after an object is uploaded to a bucket, StorageGRID can generate a notification that is delivered to a webhook. The receiving application can then start processing, indexing, transformation, compliance validation, or another automated workflow without continuously polling the bucket.

Option A describes Cloud Storage Pools/ILM-based external storage placement, not webhook integration. Option C describes ONTAP SnapMirror orchestration, which is not the function of StorageGRID webhook notifications. Option D is also incorrect: webhook-based S3 event notifications are a tenant platform service, not a replacement for Grid-level alerting technologies such as SNMP, email notifications, and StorageGRID monitoring.

NetApp identifies platform services as including CloudMirror replication, bucket event notifications, and search integration, with webhook endpoints supported specifically for event-notification delivery.

Reference topics: Tenant Manager → Platform Services → S3 Event Notifications → Webhook Endpoints → HTTP/HTTPS POST → Event-Driven Integration