* Physical objects: A package, a shipment, a vehicle, etc., is being transported.
* Information or data: A message, a file, or other digital information is being transmitted.
* People: A person is traveling from one location to another.
Examples:
* "Your order is in transit and will arrive within 3-5 business days." (This means the package is on its way to you.)
* "The data is in transit and will be available shortly." (The information is being sent to you.)
* "The passengers are in transit to their destination." (They are traveling on a bus, train, plane, etc.)
Essentially, "in transit" means something is on its way.