From Fedora Project Wiki
Contributing to Fedora can be a complex undertaking. The large number of systems to interact with on daily basis means having to check multiple different web applications to complete a task or track tickets. For new contributors, knowing where to look for information about a task across the large number of tools to interact with is daunting.
Fedora Hubs will to provide a communication and collaboration centre for Fedora contributors of all types. Current contributors will visit Hubs to check on their involvements across Fedora, discover new places that they can contribute. For new contributors, Hubs is a place to get started collaborating with others.