What is what does reins means?

Reins refers to the long straps of leather or other materials that are attached to the bit of a horse or other animal and are used by the rider to control and direct its movements. The reins are held by the rider's hands and used to communicate with the animal by applying pressure or releasing it as needed. The reins are an important part of horse riding and are essential for maintaining control and achieving desired movements. In a figurative sense, the term “reins” is also used to refer to any kind of control or authority over something, such as "taking the reins of a company" to mean assuming leadership and responsibility for its direction.