What is the use of classifying animals?

Answer 1

Classification makes the study of living organisms convenient. It also helps to reveal the relationships amongst various groups of organisms, & determine the evolutionary relationship between the different forms of organisms based on characteristics.

Sources: ChaCha Answers

Answer 2

Species are classified inherently, in a way, as every mammal species ultimately descended from a single original mammal species. Every time a new species comes into existence, it is actually the result of one species splitting into two (this usually happens when two breeds/races spend a long enough time apart - as demonstrated with ring species like Larus gulls and Ensatina salamanders, and hybrids like ligers and zorses). The two species can now be considered part of the same nested category of species, defined by their shared ancestor. In the case of mammals, the first time the first mammal species (this might be defined by an arbitrary mutation we think is important) split into two, those two species were both part of the group "mammals," as is every species that ever descended from them.

So the categories we group living things by is based on what their ancestors were. In listing a species' entire classification, we are essentially naming all the (major) species to which that species' ancestors once belonged, and which later became large groups of species.

By analogy, imagine a big tree of folders on your computer (C: for example). To describe how to get to a file from C:, you have to name all the folders you have to click on (Program Files, etc.) to get to that file (the file path). C:\Program Files\...\whatever.exe is analogous to Animalia, Chordata... Homo sapiens.

Answer 3

It's important because use no one would understand nature without the 5 kingdoms.

Plantae,Fungi, Animalia, Montrean, Protista