The significance of the Rosetta Stone in understanding ancient Egyptian hieroglyphs lies in its inscribed texts in three scripts: hieroglyphic, demotic, and Greek. Discovered in 1799, it became the key to deciphering hieroglyphs, a writing system that had long puzzled scholars. The stone, featuring the same text in different languages, allowed linguists to decode Egyptian writing, leading to a deeper understanding of Ancient Egyptian culture, history, and language. It represents a critical breakthrough in the field of Egyptology.