Can DNA be edited?

Could you possibly enlighten me on the intriguing possibility of altering DNA? I've been wondering, is it conceivable to manipulate the genetic code, perhaps enhancing certain traits or even correcting inherited defects? Would such a feat require advanced technological advancements or is it already within our grasp? Moreover, what ethical considerations would such practices raise, and how might they impact our understanding of life and its evolution? I'm eager to learn more about this fascinating topic.