Air does more than just help us breath. Air helps keep the world warm enough to support life. Air protects us from meteors. Witch burn up in the earth's atmosphere. Therefore they can strike the earth's surface.
Wind can blow so slowly and gently that it can barely be felt.
But wind you can always fell or it wouldn't be called wind it would be called just air. Wind often develops along the oceans shore during the day because land heats up faster than water. The air over shore is warmer than the air over the water. As the air over shore rises, the cooler air from the ocean moves inland and replaces it, producing an ocean breeze. At night, the air over the shore becomes cooler than the air over the ocean.