You can use knowledgebase to share tutorials and how to guides with sellers
My Task List/ TaskboardFree
Keeps a list of all your pending tasks
sellers can send direct messages to their store administrators via the masseging option.
Admin can provide important tutorials to sellers in the knowledgebase. This way, sellers can fully comprehend how all the components in the seller's dashboard function.
Admin can send out important announcements to all sellers or a select group of sellers. sellers can view the announcements on their dashboard.