A "golden opportunity" is an expression that refers to a chance or situation that presents significant benefits, advantages and potential for success. It's often used when someone has the possibility to achieve something great, but they need to act quickly in order to take advantage of it. The phrase implies that this opportunity won't last forever, so one must seize it while they can. In essence, a "golden opportunity" is an irresistible and rare chance for growth or progress that should not be missed.