Gene therapy is becoming an important area of modern medicine by offering new ways to address the underlying causes of certain genetic and inherited conditions. Instead of focusing only on managing symptoms, researchers are exploring methods to repair, replace, or modify genes that contribute to disease. Ongoing scientific studies continue to expand the understanding of how gene therapy may improve healthcare in the future. This article explains how gene therapy works, highlights its potential medical applications, discusses current research, and explores the challenges that scientists continue to address while developing safe and effective treatments for patients worldwide.