The problems that would have been associated if the classification system, naming system, would not have been given.
There would have been no common names of the organism by which they are called. The animals belonging to different places would be called by their native names.
This would create confusion and studying their characters would be difficult.
Every animals posses different kinds of characters and studying every animal and every character is not easy so classification and naming system is very important to make the study feasible.