Prehistory is the technological era that preceded written history, with major developments such as crude stone tools in the Paleolithic Age and more advanced innovations such as metal tools in the Bronze Age. The discovery of fire and the development of agriculture were also important milestones that transformed human life from nomadic to settled.
And prehistory is divided into technological eras such as the Stone Age (Paleolithic, Mesolithic, Neolithic), the Metal Age (Copper, Bronze, Iron), and the development of communication technology (such as cave paintings and early symbols). This era covers the early period before writing, where early humans used stone and bone tools for survival and later switched to metal after discovering metalworking techniques.