It connects with your Anki desktop app. You create notes in Obsidian in a specific format, and they get converted to Anki flashcards. This way your flashcard creation process becomes much easier if you already use Obsidian for note-taking.
https://unofficial-logseq-docs.gitbook.io/unofficial-logseq-...
Edit: found it: github.com/logseq/logseq#7519 (maybe there's another way of a basic page link that isn't a query so it's not quite as bad as I described above, but still)
Since there was no need to look it up, perhaps it's not relevant to whatever one is doing at the moment.
And also as a sibling comment says, language. In particular vocabulary - I've learnt a decent amount of Hindi grammar by self-study, in fact I think totally sufficient for casual or even professional conversation, but my vocabulary's really lacking, and it holds me back from speaking, which means even when I do have the opportunity to practice speaking with others, I can only say stupid basic things, I lack the vocabulary to say what I want most of the time. (And casual Hindi's way more forgiving than most languages, because 'Hinglish' is so common. But I don't get any better by just using Hindi connectives and ancillary words in an otherwise English sentence!)
Anki has definitely helped me. It's surprising how well it works if you do it daily.
I also add new cards when I come across a word I don't know. If I keep this up for years or decades, my vocabulary should be extraordinary.
Is there anything similar people use for sort of general 'knowledge base' type things - like people use one big text file, or Obsidian, or Logseq, or Notion, or whatever - but with some kind of Anki-like reminder/retrieval rather than just deliberate searching to look something up?
Or do people successfully use Anki itself in that way? (Maybe I'm wrong to associate it with focussed studying/cramming on a specific topic for an exam say?)
The closest I could think of was a Zettlekasten system, where though you wouldn't have the automated reminder prompts, you would (if you'd done a good job linking things) have a rabbit hole to fall down once you opened something.