Update README.md

README.md

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 #
 ## How to create and use shared library in Jenkins.
-- 
+
+### How to create Shared library
+- Login to your Jenkins dashboard. <a href="">Jenkins Installation</a>
+- Go to **Manage Jenkins** --> **System** and search for **Global Trusted Pipeline Libraries**.
+
+  **Name:** Shared <br>
+  **Default version:** \<branch name><br>
+  **Project repository:** https://github.com/DevMadhup/Jenkins_SharedLib.git <br>
+****
+
+#
+### How to use it in Jenkins pipeline
+- Go to your declarative pipeline
+- Add **@Library('Shared') _** at the very first line of your jenkins pipeline.
+
+**Note:** @Library() _ is the syntax to use shared library.