Binomial nomenclature is a system scientists use to name living things, like plants and animals. Each name has two parts: the first part is the genus, and the second part is the species. For example, humans are called Homo sapiens, where Homo is the genus, and sapiens is the species. This system helps scientists around the world know exactly which living thing they are talking about, no matter what language they speak.
This naming system was created by a scientist named Carl Linnaeus. It uses Latin words because Latin was the language of science when he was alive. Using Latin also makes the names the same everywhere in the world. This helps avoid confusion because common names for animals and plants can be different in each country or even in different regions of the same country.