The aim of the review is to highlight the principle of action, effectiveness and prospects for the development of targeted therapy in the treatment of patients with malignant neoplasms based on recent clinical studies. Thanks to the active study of tumor biology, specific target molecules have been discovered and it has become possible to target tumor cells with targeted drugs. Today, targeted drugs are used in the treatment of malignant tumors of various organs and continue to demonstrate their effectiveness, improve overall survival and progression-free time, compared with previous standards of treatment.