Why are scientific names used to describe organisms rather than common names?

Common names might not be as common as you think. Organisms can be known by several different common names, depending on when and where you are. Inversely, several different plants may be referred to with the same common name, depending on their similarities. Scientific names never change, and no two differing organisms have the same scientific name. This allows for a better understanding and grouping of organisms within the scientific community.