Content recommendation popup is when creating a popup to catch customer interest to use CTA (Call-To-Action), in that case, "read the full article" button. This CTA can guide the user to take the desired action.
When using in mobile, it is right to think about the background to more lucrative. Utilizing limited space, be efficient when choosing your frame.
"A picture is a worth thousand words" is a well-said word. Image quality and size proportion can be vital if you are working with a popup like above.