Although footprint fossils can not preserve the complete morphology of organisms like solid fossils, we can analyze the general morphological and behavioral characteristics of organisms from footprint fossils. In other words, when there is a lack of direct evidence, we can only use indirect evidence-footprint fossils to speculate about the environment, which animals left footprints, whether they have complex animal behavior and so on. Therefore, during the transition period from Precambrian to Cambrian, footprint fossils are particularly important.
At present, the footprint fossils found in the transition period from Precambrian to Cambrian are rarer than those in other periods is a necessary premise for the establishment of the above conclusion.