Hair transplant surgery is a technique for hair restoration where hair follicles are moved from a donor site to a balding recipient site, suitable for both men and women. Good candidates include men with male-pattern baldness and women with thinning hair, while unsuitable candidates include those with widespread hair loss or insufficient donor hair. The procedure involves multiple steps, including trimming the donor area, removing tissue, making incisions, and placing grafts, with limitations on the amount of genetically resistant hair available for transplant.