Germs, or microbes, are tiny living organisms that can only be seen under a microscope. They include bacteria, viruses, fungi, and protozoa. While some germs can cause diseases, many are harmless or even beneficial, playing essential roles in processes like digestion and nutrient cycling in the environment. Microbes are found everywhere, from the soil and water to the human body. They can reproduce quickly and adapt to various conditions, which is why they are so widespread. Understanding germs is important for health and hygiene, as it helps us prevent infections and maintain a balanced ecosystem.