Direction [via Aligment]

Takes a node of type 'Alignment' to define the direction of the emitted force.
An alignment node allows more complex directions to be created. If you want to create a simple attractor force for example you
would use an Alignment node here with an inverted spherical direction.
Emission Settings

Takes a node of type "Emission settings" to introduce additional functionality for the wind force emission.
Settings like duration, shot etc. of the Emission settings are used when the force is emitted and gives you additional control.
Strength

The strength of the resulting directional force (so the length of the emitted vector). Higher values result in more intense motions.
Manual Direction

Here you can manually set the direction of the resulting force. This one is only used if no 'Direction' node is linked.