What is a goods-in? Google doesn't show anything that makes sense in this context. At work, there are people who work at the shipping department and then deli

What is a goods-in? Google doesn't show anything that makes sense in this context. At work, there are people who work at the shipping department and then deliver the packages to people's desks. AFAIK they are paid to do this job and seem somewhat peppy compared to other similar staff in the company.