Virtual pinboard to organize and share images discovered on the web. Users can "pin" images to create visual "boards" organized by theme. Pinned images link back to original source. Users can pin, repin, follow boards, comment and engage with each other. Pinterest has apps and mobile access. It grew very quickly, popular among certain demographics. Organizations use it to highlight products and causes while linking back to their own sites. Analytics tools track pins and influence. National Wildlife Federation curates boards with range of tones to inspire and inform about wildlife.