Please note: If your publication (its specific URL) has been shared on social media before defining Share Optimization, Facebook, LinkedIn etc. caches (saves) the content for some time. 

Luckily, you can force them to get new information from the flipbook by using each platforms debug tool.
​

Click here for Facebook, Instagram & WhatsApp:

Click here for LinkedIn:

General guidelines and tips for using Open Graph

General guidelines for creating and using images with Open Graph