Designating a site collection as a hub site and associating other site collections with it
Hub sites are the connective tissue between related sites. For example, IT Vault may be a hub site that connects other site collections such as Information Security, Command Center, and End User Support, as you'll see in this recipe. Site collections that are associated with a hub site inherit that hub site's theme and navigation and can roll content (such as news, events, and documents) up to the hub for simple centralized sharing and communication.
A common example may be Human Resources as a hub site that connects its associated sites – Benefits, Payroll, and Talent. The main hub site may be a landing page that represents all its associated site collections, but also has some unique content of its own. For a deeper dive, users could go to the specific site collections associated with the hub.
One of the major benefits of hub sites is that if your organization goes...