What does the three domain system do?

The three-domain system classifies all living organisms into three primary domains—Archaea, Bacteria, and Eukarya—based on genetic and molecular data. It provides a framework for understanding the evolutionary relationships among organisms, highlighting the fundamental differences and commonalities between them. This system has revolutionized the field of taxonomy by emphasizing genetic information over traditional morphological characteristics, leading to a more accurate and comprehensive classification of life forms.