Customizations are collections of accessory data that can enhance out of the box Search behavior, depending on the nature of your content and the needs of your users.
To add customization data created in the Workbench to a project:
In the Administration Options menu, go to Projects > Your Project.
Click the Manage Content link.
Click the Languages and Customizations [Show] link.
Click the type of the customization you want to add to the content.
Check the customization(s) you want to associate with the project.
Click Save.