Positional vs Continuous Rotation Servo Motors

What's the difference between a positional and a continuous rotation servo motor? How do you control them with the Arduino servo library? Which one do you need for your project? Get all your questions answered in this video! For an example of a fun project that uses a continuous rotation servo motor, see this project on the Science Buddies website: https://www.sciencebuddies.org/science-fair-projects/project-ideas/PlantBio_p054/plant-biology/plants-grow-microgravity-arduino-clinostat