improve recipe doc

Author: mulbc

docs/recipe.md

@@ -5,6 +5,27 @@ SPDX-License-Identifier: Apache-2.0
 
 # Kubernetes Resource Protection with Recipes
 
+## Introduction
+
+Recipes are part of Ramen's OpenShift-native Disaster Recovery ecosystem, providing vendor-supplied or custom disaster recovery specifications for complex stateful applications. While Ramen supports multiple workload protection methods (GitOps, discovered applications, and Recipes), Recipes are specifically designed for applications that require:
+
+- Application-specific quiesce operations before capture (e.g., database flush)
+- Strict resource ordering during capture or recovery
+- Custom pre/post hooks for DR operations
+- Vendor-defined DR workflows that ensure data consistency
+
+**Target Audience:**
+- **Software Vendors**: Create Recipes to accompany your products, providing DR protection as a product feature
+- **Advanced Users**: Write custom Recipes when vendors haven't provided them for critical applications
+
+**When to use Recipes:**
+- Your application requires specific operations before backup (quiesce, flush, etc.)
+- Resources must be captured/restored in a specific order
+- Standard volume replication alone doesn't guarantee application consistency
+- You need to execute custom logic during DR operations
+
+For general workload protection without custom workflows, see [usage.md](usage.md) for simpler alternatives (GitOps or discovered applications).
+
 ## Overview
 
 By default, Kubernetes resources are Captured and Recovered as single, namespaced