Paper jutsu lets the user control many different sheets of paper. The paper floats around the user, and can be manipulated into different shapes, weapons, tools, and even animals for defense, attack, or supplemental making very versatile.
Paper is unique for two reasons in my eyes. one, the moves have a short and “long” range options since you can chose to launch or have a certain technique stay rotating around you (lets say paper shuriken) leading to some wacky applications. Two It also does not operate like most of any other KG, because you can mix and mingle other paper products like sealing tags, posion tags, explosive tags etc. to give your abilities different properties and applications. This is one of the strengths of paper, being able to mold to almost any situation. It has a similar versatility to poison, simply because they both can take on different qualities which matter in what you add to paper and which technique you use with poison jutsu.
Paper is naturally weak against water and oil since they weigh the sheets down. Its weak to wind since it can blow to sheets away. It is neutral against earth and fire, shown by Konan’s paper having fire resistance, and sharp enough to cut through earth. It is strong against lightning because it is an insulator, and magnetism.
konan is the only canon paper jutsu user, and even though it is implied many other characters from Amegakure can learn paper, she is the only character shown to utilize the jutsu.