What does it mean when there are invisible tags?

Perhaps you wondered why for some cards in your new mind there are no tags and it shows "Invisible Tags" — But what does that mean?

Invisible tags means we're indexing certain meta data but we don't have enough information to display a visible tag that we think is relevant. For example: If you bookmark an article or a website, we will always index the domain name and every single keyword in the title of that website or article.

Even if there are no visible tags, you should still be able to find what you're looking for if the keyword you search for is either part of the domain name, or part of the website title.

We expect this to improve over time as mymind becomes even smarter and analyses websites and adds tags automatically (the way it does it right now for pretty much all images you save).