Windows 8 introduced the "metered connections" feature. If you enable it, it can reduce the amount of data you send and receive via your limited data plan and help you save money or avoid bill shock. Some Internet service providers can charge by the amount of data used (the amount of data sent and received by your PC). The service provider monitors your Internet connection data use.
With programs and services in Windows communicating with the internet almost all the time today, this data limit can be reached quite easily. If you exceed the data limit you might have to pay extra amount or get your download speed reduced until the next month. If you have such a limited data plan, setting your network connection as 'metered' in Windows can help you reduce the amount of data you send and receive. Windows turns off unnecessary transfers while on a metered connection and tries to conserve bandwidth.
Now, in Windows 8.1, Microsoft has completely changed the UI for setting a connection as 'metered'.
The appropriate placement of this feature was in the context menu of the connection in the Network pane (which appears when you click the Network icon in the notification area). That context menu is gone from Windows 8.1. To set a connection as metered, use the following method.
1. Press the Win+I keys together and then click 'PC Settings' at the bottom.
2. Click or tap the "Network" item on the left side.
3. Click or tap your connection's name on the right side. This step is not obvious. In fact, I was first mistaken and thought that this section in PC Settings merely listed your wireless or wired connections. The fact that you have to left click again on the connection name isn't conveyed clearly.
4. Here you will be able to enable the option "Set as metered connection" (and see other details about that connection).
That's it. In case you need additional help, see the following video: