Biotechnology is playing an increasingly important role in modern cancer care by supporting advances in diagnosis, treatment, and research. Scientists are developing innovative technologies that help identify cancer earlier, understand how tumors behave, and create therapies tailored to individual patients. These developments are improving the accuracy of medical decisions while expanding treatment possibilities across many cancer types. From precision medicine to advanced laboratory techniques, biotechnology continues to shape the future of oncology. This guide explains how biotechnology contributes to cancer care, highlights important innovations, and explores the ways ongoing research is helping improve healthcare knowledge and patient support worldwide.