diff --git a/manifests/blog-app/istio-destination-rules.yaml b/manifests/blog-app/istio-destination-rules.yaml
index cb62eb2..48b2487 100644
--- a/manifests/blog-app/istio-destination-rules.yaml
+++ b/manifests/blog-app/istio-destination-rules.yaml
@@ -1,3 +1,7 @@
+# DestinationRule resource handles how the destination should handle incoming traffic.
+# In this manifest file, we are defining 'subsets' for each version of the service.
+# Then, these subsets are getting used in virtual-services-canary.yaml file to route incoming traffic.
+---
 apiVersion: networking.istio.io/v1
 kind: DestinationRule
 metadata:
diff --git a/manifests/blog-app/istio-gateway-virtualService.yaml b/manifests/blog-app/istio-gateway-virtualService.yaml
index 63a7725..c2f87e5 100644
--- a/manifests/blog-app/istio-gateway-virtualService.yaml
+++ b/manifests/blog-app/istio-gateway-virtualService.yaml
@@ -1,5 +1,5 @@
 # Gateway is a CustomResourceDefinition that helps to define how the external-traffic should be handled
-apiVersion: networking.istio.io/v1alpha3
+apiVersion: networking.istio.io/v1
 kind: Gateway
 metadata:
   name: blog-app-gateway
@@ -18,7 +18,7 @@ spec:
     # hosts: ["myblog.com"]: Accepts traffic only for myblog.com
     - "*"
 ---
-apiVersion: networking.istio.io/v1alpha3
+apiVersion: networking.istio.io/v1
 kind: VirtualService
 metadata:
   name: blog-app
@@ -26,6 +26,10 @@ metadata:
 spec:
   hosts:
   - "*"
+  # This VirtualService specifies a gateway (blog-app-gateway).
+  # This indicates that it controls external traffic entering the mesh via this gateway.
+  # The gateway listens for incoming requests from outside the cluster (e.g., users accessing your app via a web browser)
+  # and forwards them to services inside the mesh based on the rules defined in the VirtualService.
   gateways:
   - blog-app-gateway
   http:
diff --git a/manifests/blog-app/virtual-services-canary.yaml b/manifests/blog-app/virtual-services-canary.yaml
index 0409a29..1a58b16 100644
--- a/manifests/blog-app/virtual-services-canary.yaml
+++ b/manifests/blog-app/virtual-services-canary.yaml
@@ -1,3 +1,6 @@
+# VirtualService that are defined in this manifest file don't specify gateway (spec.gateway).
+# This means that they are only handling internal service-to-service communication within the mesh.
+
 ---
 apiVersion: networking.istio.io/v1
 kind: VirtualService