It's understandable if someone thinks courier and mailbox services are almost similar. They aren't, though. A courier company is a professional, both service that receives and distributes cargo as quickly as possible, whereas post office services are typically used to transfer messages and goods that might take several days to reach the point. One can ask for the same day delivery from the courier company, which is not so same in the post office services.
Reduces the enormous effort of ships tracking. Big firms that transport goods to consumers all over the world, of course, require a huge network that must be traced and controlled at all times.
Once it comes to sending products, courier services differ from conventional post offices in which there are restrictions of dimensions and weight of your parcel or goods that you want to parcel.
When utilizing post office services, dimensions, weight, and product limits are prevalent, which might prevent you from transporting items to their location. This is indeed a factor that favors courier services over postal choices since you may transport items with fewer constraints, and do very quickly with same day delivery options being offered by these big courier companies.
You'll frequently discover that post offices anticipate completion by a given day rather than a precise hour. Although something is appropriate and has no flaws, it still does not guarantee that it will succeed for the company. Courier companies, on the other hand, may provide you an approximate arrival time, which is usually considerably handier.