diff --git a/cookbook/pocketflow-structured-output/README.md b/cookbook/pocketflow-structured-output/README.md
index 6df33d4..0f05ffa 100644
--- a/cookbook/pocketflow-structured-output/README.md
+++ b/cookbook/pocketflow-structured-output/README.md
@@ -1,6 +1,6 @@
 # Structured Output Demo
 
-A minimal demo application showing how to use PocketFlow to extract structured data from a resume using direct prompting and YAML formatting.
+A minimal demo application showing how to use PocketFlow to extract structured data from a resume using direct prompting and YAML formatting. Why YAML? Check out the [doc](https://the-pocket.github.io/PocketFlow/design_pattern/structure.html).
 
 ## Features
 
@@ -65,4 +65,4 @@ skills:
 - Time management
 
 ============================
-```
\ No newline at end of file
+```