Transfer In moves items from another location to your location. These can be initiated by clicking the Transfer In quick action button to the left hand side.
These can be approved from your location and therefore are to be completed and signed off by the one initiating it in your location.
💡 Tip: you can also create other locations on the fly when doing a transfer in or a transfer out by clicking on the Add Warehouse button when doing a transfer in or a transfer out.