Why does USPS say in transit?

Related questions

1. Can USPS packages arrive before scheduled delivery?
2. What does currently in transit to destination mean?
3. Does the post office do cash on delivery?
4. What happens if I miss DPD delivery?
5. How can I contact DPD UK?
6. What is a DM consignment code?
7. What does arrived at USPS destination facility mean?
8. What is DPD predict?
9. What does it mean when your package is on its way to a USPS facility?
10. What does USPS mean when it says in transit to next facility?

Tags

1. #there
2. #reaches
3. #tracking
4. #sorting
5. #transit
6. #parcel
7. #remain
8. #status
9. #arrival
10. #unloaded
11. #destination
12. #accessed
13. #package
14. #average
15. #barcodes
16. #update
17. #since
18. #container
19. #until
20. #machine