What does open network and sharing center mean?

The Network and Sharing Center put out by Microsoft is an application on a Windows Operating System that provides you with a centralized location to manage network connections and resources. In simpler terms, it allows you to see how you are connected to the internet - VIA Wireless or Ethernet - as well as gives you the name of the current network you are in. (If applicable.) In newer Operating Systems - (Such as Windows 7 or Vista) - it also gives you the option to edit your sharing options. For example, if you are at home, and you would like to transfer a file from your laptop to your desktop without the annoyance of using a USB Drive, you could enable the sharing on both computers, and simply drag and drop from one to the other. When at a Public place, say Starbucks, it is generally wise to have this feature turned off, as it is easier for hackers to get into your settings.