

Its a staggeringly powerful app. Utilizing the markdown format and the Dataview plugin to create queries with metadata in your notes allows you to build INSANE knowledge management systems.
Example of some set ups here: https://forum.obsidian.md/t/14-example-vaults-from-around-the-web-kepano-nick-milo-the-sweet-setup-and-more/81788
The Dataview plugin is the most critical one. You can create queries with your metdata in your notes (YAML and # tags). If that sounds like nonsense to you I highly encourage you to check it out because it’s super cool. I think of my Obsidian vault as my second brain.
Below are some cool examples here that you can click through. Also note that because the obsidian pages are in markdown format you can use the Jekyll engine to directly turn them into web pages (this is how GitHub Pages works)
https://forum.obsidian.md/t/14-example-vaults-from-around-the-web-kepano-nick-milo-the-sweet-setup-and-more/81788
If you know how to do a bit of coding you can incorporate your obsidian vault with APIs from other apps you use. Maybe you want to make a fancy home page that displays all your tasks from ToDoist, alongside the RSS feeds to your favorite podcasts and YouTube channels. Maybe you are tracking your habits and using DataView to compile all relevant instances of #habit tags into one calendar for a birds eye view.