What is meant by loop in loop out wiring?

Loop in loop out wiring refers to a method of connecting electrical circuits where power is fed into a junction box and then continues to another destination without the need for additional wiring runs. This technique is commonly used in lighting circuits, allowing multiple light fixtures to be connected in series while maintaining a single power source. It simplifies installation and reduces the amount of cabling required, making it a popular choice in residential and commercial electrical systems.