Vim is a modal text editor descended from Vi, with Neovim serving as a modern, extensible fork that adds built-in LSP support, Lua scripting, and a robust plugin ecosystem. Unlike traditional editors, Vim operates through distinct modes—Normal, Insert, Visual, and Command-line—enabling rapid text manipulation through composable commands. The core philosophy is editing at the speed of thought: operators combine with motions and text objects to form a grammar (ciw = change inner word), making complex edits concise and repeatable. Mastering modal editing and the dot command (.) transforms how you interact with code, turning repetitive tasks into single keystrokes.