The site collection, which will host content types for
sharing, is known as content type hub. Content Type Hubs enables you to create
new content types and then make them available to other SharePoint site
collections in the same or different web applications or across farms. This is
a publisher-subscriber model, where content types are published by the Content
Type Hubs using Metadata service and subscribers are the web applications in
the SharePoint Farm. Finally, all the site collections in the web application
which subscribe to this Metadata service will get this content type. To enable
your site collection to be a content type hub you need to activate a feature
known as "Content Type Syndication Hub" in the site collection level.
In this blog you will see how to configure Content Type Hub in SharePoint 2013.
Click on Application
Click on Manage
service applications which is available under Service Applications.
Metadata Service and then click on Properties
in the ribbon interface.
Enter the content type hub site URL in the Content Type Hub text box.