Small stepper for small applications. These motors are often used in applications where you need to move something to a specific position. They are often used in 3D printers to move the print head. As these are smaller then the NEMA17 motors they are often used in smaller applications and more light weight.
NEMA is a standard for stepper motors NEMA14 is 35mm x 35mm and can have various lengths.
These motor can be controlled using a stepper driver and require a power supply to control them.