Image Stabilization, or IS, is somewhat standard on most newer cameras and lenses and allows you to shoot at slower shutter speeds (usually two settings slower) than you would be able to without it. However, what are its limitations, when should it be used, and in what shooting situations? In this short video from Adorama, photographer David Bergman explains how the image stabilization feature works on your gear, as well as what you should know about turning it on to make your shots more steady.
This article over at NoFilmSchool goes into the detail and cover some of the gotchas that you should look out for!