Tamil-Brahmi is a type of writing that was used a long time ago in the Tamil language. It's like pictures that people made with a special tool called a stylus on rocks or the wall. Each picture was like a special code that people understood as a letter or word.
It's like how mom writes letters to your grandparents with a pen on paper, but instead, people wrote letters with rocks on big walls. But it's not the same as pictures you draw with crayons because each picture represents a sound or word that people knew how to read and write.
Tamil-Brahmi was important because it helped people share important ideas and stories with others. People could read and write things down, then send it to other people so they could learn something new. Just like how you write words in your notebook at school so you can remember them later.
Today, people don't use Tamil-Brahmi anymore because we have new ways of writing things like on phones or computers. It's important for us to remember Tamil-Brahmi because it's a part of our history and how people communicated in the past.