Best practice for shareable webpage thumbnail?

Is there a best practice for adding/creating a webpage thumbnail for sharing?

I found this on-line Adding a website image thumbnail for sharing your HTML site successfully on social media (Facebook, LinkedIn , Twitter) 👥 | by Nicolas Carmont | Medium but I was thinking there must be a less convoluted way to create this. It would make a nice stack, or maybe it already exists, and I am just in the dark?

Is it already part of Rapidweaver?

I was thinking it might be a neat thing to have for each individual page.

Not directly a F3 question, but maybe it is?

Thanks for any clarification