Why Emacs Is Good?
Emacs Is (Arguably) Easy to Learn Rather Than Using Your Mouse to Move the Cursor Around and Navigate Between Files or Shell Prompts, You Instead Use Keyboard...
What is so great about Emacs?
Emacs is Extensible
The GNU Emacs manual describes Emacs as the extensible, customizable, self-documenting, real-time display editor. And with a good reason - it's extremely easy to add new features to Emacs, due to its integrated Emacs Lisp interpreter.
Why do I need Emacs?
Emacs helps you be productive by providing an integrated environment for many different kinds of tasks: All of the basic editing commands (and there are lots of them) are available no matter what you're trying to do: write code, read a manual, use a shell, or compose an email.