Quantization effects refer to the changes that occur in a system when it is analyzed at very small scales, typically at the level of atoms or subatomic particles. In quantum mechanics, energy levels are not continuous but instead exist in discrete packets called quanta. This means that certain properties, like energy and momentum, can only take on specific values, leading to unique behaviors that differ from classical physics. These effects become significant in various fields, including quantum computing and nanotechnology. For instance, in quantum dots, tiny semiconductor particles, the quantization of energy levels allows for the manipulation of light and electronic properties, making them useful in applications like solar cells and LED technology.