Screen Sharing is the term for allowing your display to be viewed remotely on a separate device. It is also the name of a Macintosh application for viewing a remote display.
Screen Sharing is the term for allowing your display to be viewed remotely on a separate device in real time (as opposed to a screenshot image or asynchronous screen recording).
It is also the name of an application built into the Macintosh OS X Lion for viewing a remote display such as that provided by a VNC server.