An actionable item — usually from a finding — that you work through and mark done to track progress.
Tasks are the to-dos CommandSEO produces from its findings. Each is a concrete action ("Add a descriptive H1 to /about") with the reasoning attached, so you — or your developer — know exactly what to do and why.
Tasks have a status (to do, in progress, done) and live on the Action Board, grouped so you can work through them in a sensible order.
What to do about it
Pick up tasks in severity order, apply the change (yourself or via your dev), then mark the task done. CommandSEO re-scans the live page to confirm the fix actually shipped.