Switching from Notion to Obsidian

> One of the most outstanding Obsidian feature is the one which allows you to link markdown files between them, also using hashtag visualizing the connections in a graph that is generated by a core plugin. It helps to visualize your “ideas”, clarify the connections between ideas, topics and thoughts.

I've never seen anyone explain clearly what they get out of it. "Visualize", "clarify"… you mean "staring at it", right? And then?

It's beautiful, sure, I can see myself wanting this graph view. But when I step back I have no idea how I would actually use it productively.