From
https://www.iis.net/learn/get-started/whats-new-in-iis-8/installing-iis-8-on-windows-server-2012
Server Manager in Windows Server, new and accordingly, the user experience have changed as well.
This step-by-step instruction was not a unique to installing IIS. It is meant to assist IIS customers with navigating through the new Server Manager quickly.
Step by step instructions Prerequisites:
· Windows Server has been installed.
Workarounds for known Bugs:
· There is no known bugs for this feature at this time.
Installing IIS 8 with the DEFAULT SETTINGS
To install IIS 8, use the following steps:
1. Open Server Manager.
2. Under Manage menu, select Add Roles and Features:
3. Select role-based or feature-based installation:
4. Select the appropriate server (local is selected by default), as shown below:
5. Select Web Server (IIS):
6. No additional features is needed for IIS, so click Next:
7. Click Next:
8. Customize your installation of IIS, or accept the default settings that has already been selected for your, and then CL IckNext:
9. Click Install:
When the IIS installation completes, the wizard reflects the installation status:
Click Close to exit the wizard.
Installing IIS 8 on Windows Server 2012 Microsoft Official Installation Guide