How to use a custom thumbnail when posting a WordPress link to Facebook
If you’ve ever posted a link to Facebook, you know that it brings up a thumbnail image for that page (sometimes) and it chooses them from random images on the page. Sometimes you’ll only have one to choose from, sometimes hundreds. But you may want a specific image to show when you post that link, and Facebook has provided a way to do that. But if you’re using WordPress it’s not simple HTML hack like with other pages, but it’s still really easy. I’ll show you how.
