Which completely fails to answer the basics: What is fugitive, what problem does it solve, and what do I need in order to run it. I'm getting the impression t

Which completely fails to answer the basics: What is fugitive, what problem does it solve, and what do I need in order to run it. I'm getting the impression that it's a plug-in for the vim text editor, but considering that I had to dig to get that basic lead information, that's really bad.