What is the difference between rolling shutter and global shutter?

For rolling shutter sensors, each row of pixels is exposed at different times. For fast-moving objects, images obtained from rolling shutter sensors will have some degree of distortion. Global shutter sensors can solve this problem because every pixel in the sensor is exposed simultaneously. Due to the complex architecture of global shutter sensors, global shutter sensor cameras are more expensive than rolling shutter ones, and readout noise is also slightly higher than rolling shutter sensors.

Left: rolling shutter, Right: global shutter