SDG 3, "Good Health and Well-being," aims to ensure healthy lives and promote well-being for all at all ages by 2030, encompassing universal health coverage (UHC), reproductive and maternal health, fighting communicable diseases like HIV/AIDS and tuberculosis, reducing non-communicable diseases, promoting mental health, and ensuring access to safe medicines and vaccines. Achieving this goal requires strengthening health systems, increasing health financing, investing in research and development, and addressing global health emergencies like the COVID-19 pandemic.