It creates image previews of a website from a link. The result is optimized to be embedded into your notes without taking up too much space.
Have a look at Stephan’s example of a video watch list note:
Or this experiment application by @Will:
Finally, here’s a close-up of Sascha’s blog post, “Don’t Dehorsify the Horse”:
Check out his free online tool at https://link-previews.stephanbogner.de/ and leave feedback for Stephan in the comments!