IIS stands for Internet Information Service
IIS is web based server which integrates asp.net, wcf and SharePoint services.
In windows by default IIS is off. So first you need to enable or install IIS server.
First go to the windows on off features
Now select the Internet Information Service and click on ok
Now go to the run and type inetmgr and your IIS server will be opened.
For any query you can send mail at firstname.lastname@example.org Thanks