Please excuse my ignorance, but what would be the use case of fine tuning? I'm quite interested in this application of it for hobby projects, but I'm not sure what value I would be able to gain.
Fine-tuning is how you can turn raw base models into something that you can chat with, and into something that can follow commands. Fine-tuning can be also used to control the style of speech the model uses, and what it will be and won't be willing to discuss. To an extent, it can also teach the model to understand new things.