diff --git a/README.ko.md b/README.ko.md
index e06af4a..676e813 100644
--- a/README.ko.md
+++ b/README.ko.md
@@ -1075,6 +1075,8 @@ Some markdown contents
 
 ### tab / tabs => 여러 버전의 뷰를 제공할 때 쓰세요
 
+탭을 만들 때, 각 탭마다 안의 내용에 따라 고유 아이디를 부여하기 때문에, Tab 안에 있는 내용이 서로 달라야합니다.
+
 `````
 {{< tabs Windows MacOS Ubuntu >}}
   {{< tab >}}
diff --git a/README.md b/README.md
index 4d17563..eacb8cd 100644
--- a/README.md
+++ b/README.md
@@ -1068,6 +1068,10 @@ Some markdown contents
 
 ### tab / tabs => Tabs make it easy to explore and switch between different views
 
+⚠️Becareful that the content in the tab should be different from each other.
+The tab makes unique id hashes depending on the tab contents.
+So, If you just copy-paste the tabs, since it has the same contents, the tab will not work.
+
 `````
 {{< tabs Windows MacOS Ubuntu >}}
   {{< tab >}}