Biological classification, also known as taxonomy, is the science of organizing and categorizing living organisms based on their similarities and differences. This system of classification helps scientists to understand the relationships between different species and how they have evolved over time. The classification system typically uses a hierarchical structure, with organisms grouped into categories such as kingdom, phylum, class, order, family, genus, and species. This system allows researchers to easily identify and study different organisms, and helps to facilitate communication and collaboration among scientists.