NBD (Next Business Day) on-site warranty is a premium guarantee for second business day service at your home. It does not have to be at the exact address of your residence, but it can also be a company's headquarters, or even an address on your business trip or vacation.
In the event of an accident or when something breaks, a professional service technician will arrive after a long-distance diagnosis and provide service, including spare parts. You no longer have to worry about packing a laptop into a box and sending it to get it fixed somewhere else.