Biko no Jutsu, [Shadowing Stealth Technique]
Biko Ninjutsu is the Ninjutsu technique that the ninjas use to follow their targets covertly. The manner in which the ninja shadows their target can differ, from the basic hiding under a nearby object, to using a Jutsu to turn oneself invisible.
It's just hiding to a novice degree, it wouldn't actually turn you invisible and such. Remember, it's a E rank for a reason. Mastered, imagine a better skilled version of konohamaru's hiding.