Backlog
The Backlog is a board for planning deliverable units of work — tasks of type Task, Bug, Improvement, and Research. Note that Epic and Story tasks are not listed in the Backlog, since they aren't deliverable units of work themselves; you'll find those on the Product Delivery and Road Map boards instead.
AI-generated tasks of type Task, Bug, and Improvement are automatically moved to the Backlog, where they should be reviewed and assigned to a sprint. You can create future sprints and leave them pre-organized — the PO agent will automatically start the next scheduled sprint at the end of each current one.