Agreed normal use of aileron by pilot.
There is no such thing as a silly question - but you can always tell when an aircraft is affected by a cross wind as in the first moment after unstick the nose will move (yaw) sideways into the crosswind. So wind from the right nose will go to right.
A wind shear is the term used for a sudden and marked change in the local wind strength (and perhaps direction). Passing through a wind shear gives a sudden and marked change of airspeed, which if it results in a loss of airspeed can suddenly reduce the lift available. A sudden loss of height/sink with no change in aircraft attitude (following a period of stabilised flight) could indicate a windshear.