You've seen it everywhere by now, but you may be asking what exactly is shiplap? Shiplap was traditionally used on sheds, barns and cottages, but there has been a recent craze of bringing it inside. Because it can withstand moisture, shiplap is a great interior paneling for bathrooms. Its strong lines and bright white finish also work on accent walls, backsplashes and fireplace frames.
Source : http://www.nwitimes.com/lifestyles/home-and-garden/modern-farmhouse-must-haves/article_2abd618f-bd1c-529c-8895-06b157261046.html