Nasta'liq script is a way of writing letters and words in a style that is used in certain languages, like Persian and Urdu. It looks different than the way we write in English because the letters are connected to each other in a fancy way. It is like drawing a picture with your pen instead of just writing boring letters that don't look nice. Nasta'liq script is often used to write poetry or important documents in these languages. So, it's like having a fancy handwriting that you use to write special things.