The ozone layer plays a crucial role in protecting life on Earth by absorbing the majority of the sun's harmful ultraviolet (UV) radiation, particularly UV-B and UV-C rays. This absorption prevents these harmful rays from reaching the Earth's surface in high concentrations, which could lead to various health issues such as skin cancer, cataracts, and weakened immune systems in humans and other living organisms. The ozone layer acts as a natural shield, helping to maintain the delicate balance of life on our planet by protecting us from the harmful effects of excessive UV radiation.