Why did the Egyptians use identification badges?

Identifiers were used by the ancient Egyptians due to the lack of vowels. Such an icon was written after a word to convey the concept of a word. It was also called “diacritical”. The identifier icon is usually not readable, but only explains. In Egyptian writing, many words were written the same way. In this case, such an icon was also used. Considering that there were a huge number of hieroglyphs in ancient Egyptian writing, such an icon greatly facilitated the reading process.