This modules is a tool to ignore all the configuration stored in feature modules while using config sync, automatically. By using this module, there are no conflicts between features and your configuration management anymore!
Lets say that you do would like to share a content type between your websites, but every time you import your changes, your content types config is broken.
Then this module is what you are looking for.
Dependencies
You will need the config_ignore and features module to be enabled.