What is Vim?
Vim is an advanced text editor that seeks to provide the power of the de-facto Unix editor 'Vi', with a more complete feature set. Vim is a highly configurable text editor built to enable efficient text editing. It is an improved version of the vi editor distributed with most UNIX systems. Vim is distributed free as charityware.
Vim is a tool in the Text Editor category of a tech stack.
Why developers like Vim
Comes by default in most unix systems (remote editing)
Less mouse dependence
It's for pros