Definition: Content Type HUB is a Site Collection in SharePoint, where we create and manage content types and publish those content types to use in other web applications.

We can create content types in content type HUB and publish them to use in other web application. Creating content types in a central location (HUB) becomes very easy to manage and publish the content types.

Process to create HUB:

• Create Web Application
• Create a root Site Collection within web application using any template
• Activate “Content Type Syndication HUB” feature from Site Settings >> Site Collection Features
• Setup Manage Metadata Service Application from Central Administration
• Create and Publish Content Types.
• Run two Timer Jobs from Central Administration >> Monitoring
  (1) Content Type HUB
  (2) Content Type Subscriber – Run the Job of the Web Application which is going to receive content types)
• Verify published content type. Go to “receiver” site collection >> Site Settings >> Site Content Types