What does it mean?
Image courtesy of Facebook

Head to your Facebook profile and click the "Activity log" option at the bottom right of your cover photo. Image courtesy of Facebook

Question

What does it mean?
Image courtesy of Facebook

Head to your Facebook profile and click the "Activity log" option at the bottom right of your cover photo. Image courtesy of Facebook

Answer

It means that facebook provided (or gave) that image/picture.
The image comes from facebook.