Abstract: A magnetic skyrmion is a type of topologically protected swirling spin structure, and has been extensively studied in recent years. It can be manipulated by many external stimuli, is small in size, and has a low critical depinning current density. Compared with the conventional magnetic domain walls, bubbles, or vortices, skyrmions are thus more promising information carriers for future spintronics devices with ultra-low energy consumption and ultrahigh storage density. In this review we focus on the potential device applications based on magnetic skyrmions, such as information storage, logic computing, and neuromorphic computing.