A PMB (Private Mail Box) is an address where I can have mail and packages sent to. A PO Box is much cheaper, but also much more limited. I don’t want anyone to have my residence address, and I am not confident on having packages delivered to my home address. With that in mind, I pay an annual fee for the PMB that allows me to have a place for my mail and packages. Unless the week has a holiday on Monday or Thursday, I will check my box twice in a week. On weeks with holidays on either of those 2 days, I will check my box once a week.