It provides a keystroke-based language for working with textual information. That language embodies concepts that we think of the information and operations rel

It provides a keystroke-based language for working with textual information. That language embodies concepts that we think of the information and operations relating to it in terms of -- words, sentences, code blocks, etc, and deleting, changing, etc these. This allows us to directly translate our thoughts "I want to delete this sentence" into actions "das".