Basically this means that network does not like your posts.
- In some cases network does not allow posts from your website/domain/server/IP/etc. (For example the whole 000webhost.com free hosting provider is permanently banned on Facebook and some other networks. Too many people tried to setup the sites there for the purpose of spam.)
- In some cases network rejects the content of your posts or links from your posts. Many networks do not allow some or all URL shorteners.
- In some cases network does not like how often you make your posts. Please do not post too much or too often. Please follow the terms and guidelines for each network.
- Some networks don’t like shortened URLs. Please make sure you are not using URL shortener.
Please contact network directly if you have questions or concerns about that issue. If you get problems with Faceboook you can also try to check your site in the “Facebook Debug Tool”: https://developers.facebook.com/tools/debug