You share a post of your wordpress blog in a social media, but not satisfied with the result. Because the shared post do not shows the proper image or the proper post title or description.
Here is a code you need to insert in your theme’s function file. This code will help social media to fetch proper information of your posts.
Whenever a post is shared in social media, this code will help social media to fetch post title, post description or post excerpt, featured image of that post if set, otherwise a default image is shown. That’s everything the basic of sharing a post through social media.
You need to put a default image (here wbxpress.png is used) in your theme’s folder inside images sub-folder.
If you need a detailed explanation of the codes above you read it from here.
Now you may check whether it really works or not from this debug tool by facebook.