CRISPR and other gene-editing technologies are revolutionizing cancer therapy by enabling precise modifications to the genetic material of cancer cells. These technologies can be used to knock out genes that drive cancer cell proliferation or repair tumor-suppressor genes that are defective in cancer. In addition to directly targeting cancer cells, gene-editing tools like CRISPR have the potential to enhance immune responses by modifying immune cells to better recognize and attack cancer. Although challenges exist in delivering these therapies safely and efficiently, the ability to precisely edit genes holds immense promise for personalized medicine. As research progresses, gene-editing therapies could play a crucial role in providing more effective and targeted cancer treatments.