diff --git a/deploy/manifests/BUILD.bazel b/deploy/manifests/BUILD.bazel
index d95b02716..bfd1d8e50 100644
--- a/deploy/manifests/BUILD.bazel
+++ b/deploy/manifests/BUILD.bazel
@@ -10,6 +10,7 @@ RELEASE_NAME = "cert-manager"
 
 RELEASE_NAMESPACE = "cert-manager"
 
+# This genrule removes helm annotations.
 genrule(
     name = "crds.nohelm.yaml",
     srcs = [
@@ -57,6 +58,7 @@ genrule(
     ]),
 )
 
+# This genrule removes helm annotations.
 genrule(
     name = "unlicensed.nohelm",
     srcs = [
diff --git a/hack/filter-crd/main.go b/hack/filter-crd/main.go
index 51b260284..8a2f35d35 100644
--- a/hack/filter-crd/main.go
+++ b/hack/filter-crd/main.go
@@ -28,6 +28,8 @@ import (
 
 var removeKeys = []string{}
 
+// This code generates regular cert-manager deployment manifest from
+// one created for Helm by removing Helm-specific annotations.
 func main() {
 	loadVariant()