How does Facebook Sharer select Images and other metadata when sharing my URL?

Question

When using Facebook Sharer, Facebook will offer the user the option of using 1 of a few images pulled from the source as a preview for their link. How are these images selec

Answer 1

When you share for Facebook, you have to add in your html into the head section next meta tags:

And that's it!

Add the button as you should according to what FB tells you.

All the info you need is in www.facebook.com/share/