Creating web folder to store the websites content in IIS
When you want to publish content for access over the Internet or an intranet connection, you can add a Web site to your Web server to hold the content. During IIS 7 installation, a default Web site configuration is created in the \Inetpub\Wwwroot directory on your Web server. You can either use this default directory to publish your Web content, or create a directory at a file system location of your choice. When you add a Web site in IIS 7, a site entry is created in the ApplicationHost.config file. The entry specifies the network binding for the site, maps the site to a location in the file system, and optionally specifies user credentials for content access.
Creating more than one website with one IP address by using Binding
To host more than one Web site on a Web server, you can assign a unique IP address to each Web site, designate a non-standard TCP port number for a Web site, or use host headers. Of the three methods, it is more common to use host headers than to assign unique IP addresses to Web sites or to use non-standard TCP port numbers. A Web site is a container for Web applications, and you can access it through one or more unique bindings. A Web site binding is the combination of an IP address, a port, and the optional host headers on which HTTP.sys listens for requests made to that Web site. Web site bindings use the HTTP or HTTPS protocols.
Creating new zones and host record in the DNS server
A DNS zone is the range of IP addresses for which your DNS server hosts naming information in the DNS namespace. The DNS Forward Lookup zone is used to resolve computer host names to an IP address ("forward name resolution"). Each computer requires a host record or "A" record to identify the computer in the DNS system. The host record consists of the host name of the computer along with its corresponding IP address. An AAAA (or "quad-A") record is similar to an A record, except that it maps a hostname to an IPv6 address. An A record specifies an IPv4 address, which is currently the dominant Internet Protocol version.