How did Sumerian writing change over time?

Sumerian writing evolved from simple pictographs to a more complex script known as cuneiform, which utilized wedge-shaped marks inscribed on clay tablets. Initially, these pictographs represented tangible objects, but over time, they began to symbolize sounds and abstract concepts, allowing for more sophisticated expression. By around 3000 BCE, the writing system became increasingly standardized, facilitating administration, trade, and literature, and it adapted to accommodate other languages as well. This evolution reflects the changing needs of Sumerian society and its cultural advancements.