about post on facebook

Can you give me more information into what you mean? Links to your site and a link to a Facebook post would be most helpful.

Also, using excerpts, you can customize what Publicize sends to Facebook. Here’s a cheat sheet that might be useful:
http://a.mikey.link/1l6WZ/3QZpzCMK

Using the Title, Custom Message, and Excerpt, you can customize the way any posts get shared to Facebook. If you don’t change the default custom message, it will post a longer excerpt of your post content.

I hope that clarifies things!