Ah, OK. Basically many terminal emulators allow you to create text that is clickable, with the click going to an arbitrary URL. That could be a URL on the internet, but there are more interesting possibilities: e.g. you click on a line number in your terminal and it opens in your editor / IDE at that line number.
The standard link that started it is https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3c..., but if you do internet searches for terms like `terminal hyperlinks ripgrep` or `terminal hyperlinks ls` or `terminal hyperlinks delta` you'll find more.
