The water element is one of the basic elemental nature transformation techniques that allow the user to manipulate pre-existing water, or create their own, by turning their chakra into water.It takes much more ability to create the water outside the body than to manipulate what is already available or expel it from their mouths.One of the most versatile of the five basic chakra natures, Water Release techniques can not only change shape but state as well.... and I personally believe that water is one of the important element of the 5 elements.... you see water is the source of life in our world..... but it also can be the source of destruction of our world also.
The water is strong against fire because it removes the oxygen. and its weak against earth
Because earth is an solid element and hard to go trough.
Water can be used in combination with lightning when using a large jutsu that give a large amount of water.
When you add lightning to it,everyone in the water will get hit.
It could be used together with wind in order to increase speed and such.
The best suit on user would be hashirama or MEi.
Further more ,zabuza,haku,yamato and kiss me use water enough and are good with it.
It's also part of multiple kekai genkai,such as ice release,vapour release etc