Wind causes weathering, erosion, and deposition, which can all affect landforms.
Weathering, by definition, is the various processes that causes rock to decompose. Wind can cause weathering and affect landforms. Take, for example, a mountain. Wind picks up sand from a nearby beach and blows it into the mountain. Little by little, the sand wears away at the mountain, changing the landform.
Erosion can be caused by wind as well. The wind could blow away sediment that makes up the mountain. It could also move the sediment around the mountain from one place to the next.
Deposition can also be caused by the wind. The wind could pick up the sand from the beach. However, instead of throwing it at the mountain, the sand could be deposited and settle on the mountain, changing the landform.