A feature of making trails could be quite useful in your game. Especially if your game includes tracking or survival elements this kind of effect could add some realism. Making deformable material like snow, mud or any kind of goo is actually quite easy. You can find a lengthy tutorial on this subject in this
It is part of the series, but works as a stand-alone tutorial.
However, keep in mind that like any effect, these can cause a performance hit on your game, so you should judge carefully when and how to implement them.
Unreal Engine Pathways 