An Original Bill of Lading (or ‘OBL’ for short) is an original copy of the shipping documents for your order. It will be sent to you separately (and hopefully in advance) of the rest of your shipment.
These original documents represent Title to your order and will need to be ‘surrendered’ to the transporter before your goods can be collected, so don’t throw them in the trash! Instead, forward them to your customs broker or freight forwarder as early as possible.