The package is moving (or waiting to move) between FedEx facilities toward the destination. This status covers most of the journey — and hides all of the detail.
Why packages get stuck here
Hub congestion — Memphis and Indianapolis sort everything; one backup ripples nationwide
Weather holds on air routes
Trailer volume: ground packages wait for trucks with room
How long it usually lasts: 1–5 days for Ground, usually overnight-to-2-days for Express.
What to actually do
Normal for days at a time on Ground service
If it's been static 5+ days with no new scan, open a trace with FedEx
Screenshot the tracking history before you call — reps see the same data