Due to how they’re made, safe boxes are a great way to store valuables such as jewelry, cash, checks, documents, USB drives, and so forth. In the event of burglary, it’s much better to place your valuables inside of safe boxes instead of leaving them out or in the open or anywhere too obvious.
Some of the safe boxes also provide some form of fire-resistant or even water-resistant protection, so your valuables will remain intact even in case of natural disasters, including earthquakes and floods. Numerous restaurants and retail shops use safe boxes as a safe way to deposit some cash, so it’s harder for an unauthorized individual to get their hands on it. Basically, any brick and mortar business where cash is collected can greatly benefit from them.
This is why this type of safe box is called "Deposit Safe", or "Night Deposit Safe". This unique design allows valuables to be placed from the drawer or the slot that’s located on top, but only an authorized operator can take them back out again. This is how they differ from regular safes.
Why is this important? For example, an employee tasked with collecting cash or other valuables and placing them in a safe deposit box can only place them inside for safekeeping, but cannot take them out without knowing the passcode. Depending on how your business is structured, this could make a world of difference. In addition, unless someone has seen what you decided to put inside your safe deposit box, no one will ever know its contents. This can be of great use to you if you have a solid reason to hide something from open view. As for what this item might be, is completely up to you to decide. As long as you buy a large enough safe deposit box, you should be fine.