Trackways have helped researchers:

Understand that both plant-eating and meat-eating dinosaurs carried their large, long tails in the air.

Some early paleontologists thought that these massive tails must have dragged behind the animal. However, track studies show that tails rarely made drag marks behind the animal, although marks interpreted to be prints of a slashing tail have been found and interpreted as an indication that the animals may have used their massive tails defensively.