One of water's important properties is that it is composed of polar molecules: the hydrogen and oxygen within water molecules (H2O) form polar covalent bonds.
The most important property of water is it's bend.
Explanation:
As a molecule, water is bent. This bend is what causes the polarity of water. In turn, this polarity is responsible for almost all the notable properties of water, including the heat capacity and the density of ice, which are two of the most important results.
