What do you use Obsidian for?

I find the idea of owning a personal knowledge graph incredibly intriguing, but I've had trouble getting started. To be frank, I'm not quite sure what to include. A lot of the information that I might feel like I would want to save is also readily available via Google and can be retrieved faster by Googling than by diving into my Obsidian notes. I'm focusing primarily on personal use-cases, so nothing for business or freelancing. What do you use Obsidian for? And how much do you use it? Tens of notes per month... Or hundreds? Or even thousands?