Location awareness is a feature of Sophos Client Firewall that assigns a firewall configuration to each network adapter on your computer, depending on the current location of the network adapter.
The most common scenario in which this feature is used is where you have a company laptop and you work from home. You are using two network connections simultaneously:
For work use, you connect to your office network through a VPN client and a virtual network adapter.
For personal use, you connect to your ISP through a network cable and a physical network adapter.
In this scenario, you need the office configuration to be applied to the virtual office connection and the non-office, generally more restrictive, configuration to be applied to the non-office ISP connection.