Rolling shutter and global shutter are film industry terms used to describe how a camera records an image from the image sensor. This discernment most likely won’t matter to a casual user, but the difference makes a dramatic difference for a director or cameraman.
“Rolling shutter” is a term used to describe an image sensor that takes data from different areas of the sensor at different times. The most common rolling shutter sensors send data from the top of the sensor, work their way downward until they reach the bottom and start at the top again. This cycle occurs many times per second depending on the frame rate, which is usually 24, 30 or 60 times per second.