Microorganisms, often referred to as microbes, are tiny living organisms that are too small to be seen without a microscope. They are found everywhere - in the air, water, soil, and even inside other living organisms. Microorganisms come in various shapes, sizes, and types, including bacteria, viruses, fungi, protozoa, and algae. Despite their small size, these microbes play crucial roles in numerous ecosystems, ranging from decomposing organic matter to aiding in various biological processes.