diff --git a/content/roadmaps/107-nodejs/content/117-nodejs-common-modules/100-builtin-modules.md b/content/roadmaps/107-nodejs/content/117-nodejs-common-modules/100-builtin-modules.md
index ab78635e1..f87714ad8 100644
--- a/content/roadmaps/107-nodejs/content/117-nodejs-common-modules/100-builtin-modules.md
+++ b/content/roadmaps/107-nodejs/content/117-nodejs-common-modules/100-builtin-modules.md
@@ -1 +1,22 @@
-# Builtin modules
\ No newline at end of file
+# Builtin modules
+
+Built-in modules are already installed with `Node.js`, so you don't need to install them with any package manager (yarn, npm, etc.).
+
+- **fs**: dealing with the system files.
+- **os**: provides information about the operation system.
+- **net**: to build clients and servers.
+- **path**: to handle file paths.
+- **url**: help in parsing URL strings.
+- **events**: provides a method for interacting with events.
+- **http**: making Node.js transfer data over HTTP.
+- **console**: to log information in the console.
+- **assert**: provides a set of assertion tests.
+- **process**: provides information about, and control over, the current process.
+- **cluster**: able to creating child processes that runs simultaneously and share the same server port.
+- **perf_hooks**: provides APIs for performance measurement
+- **crypto**: to handle OpenSSL cryptographic functions.
+- **Buffer**: provides APIs to handling streams of binary data.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='blue' badgeText='Official Website' href='https://nodejs.org/api/modules.html'>API documentation of Built-in modules</BadgeLink>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.w3schools.com/nodejs/ref_modules.asp'>Built-in modules - w3schools</BadgeLink>
diff --git a/content/roadmaps/107-nodejs/content/117-nodejs-common-modules/readme.md b/content/roadmaps/107-nodejs/content/117-nodejs-common-modules/readme.md
index 1a8794d82..e1a80c46b 100644
--- a/content/roadmaps/107-nodejs/content/117-nodejs-common-modules/readme.md
+++ b/content/roadmaps/107-nodejs/content/117-nodejs-common-modules/readme.md
@@ -1 +1,3 @@
-# Nodejs common modules
\ No newline at end of file
+# Nodejs common modules
+
+These are the common modules that come with `Node.js` out of the box. This module provides tools or APIs for performing out certain standard `Node.js` operations. like interacting with the file system, url parsing, or logging information to the console.