How did linnaeus classify organisms? why is his system for naming organisms so useful?

The species is the smallest among all group; it has only one kind of organism.  Through to the system developed by Linnaeus, each organism is given a two-part scientific name that consists of a genus name and a specific name. The words used for scientific names are from the Latin and Greek languages. They sometimes seem difficult to read and even harder to pronounce. Since the different species of organisms number in the millions, it is necessary for scientists around the world to have a common language to be able to identify any organism with accuracy. As you know, people in different countries have different names for organisms. This naming system prevents confusion.

i am sorry but i need more information and a picture.