How SharePoint determines thumbnail of external news links

Copper Contributor
Hi I would like to understand the logic of how SharePoint is determining and pulling the thumbnail image when I paste a hyperlink through add news link in my hub site as it’s pulling some times and it’s not pulling from other links
however the title and some description is still getting pulled

Anyone has an idea so I want to implement for my intranet site to pull over the thumbnail from external sites automatically rather than manually choosing it at all times
1 Reply
I think what it does is just read the HTML of the externa news and just gets first image it founds....but it's just a guessing