You need to realize that to ensure the proper delivery and shipment of various goods, there are various people who will be working to make sure that these things will happen. The freight forwarder is someone who is in charge of the movement of the goods from one point to another. The freight forwarder will do this for the cargo holder.
This person will be in charge of following the instructions that were given. The clearing agent, based on the name of the agent, will be in charge of clearing all details regarding the shipment and the package so that the package will be received at the right time and place.