FTL is an acronym used in the industry that stands for "full truckload." FTL shipments are your shipments that require a carrier to dedicate the entire space of their equipment solely to making sure it gets to its destination.
On the other hand, an LTL, or "less than truckload," shipment is what is used to refer to shipments smaller than an FTL and allows for multiple LTL shipments to be transported on a carrier's equipment. Which service you require depends on your shipping needs. Shipments that require direct transportation and unique care should move as FTL shipments to minimize the transit time and to increase the safety of your shipments.