The cluster of water molecules is shown in the image attached.
A hydrogen bond is formed when the oxygen atom of one water molecule draws the hydrogen atom of another water molecule together in a cluster of water molecules. Compared to covalent bonds, this bond is weaker, but it is stronger than normal dipole-dipole interactions.
The overall structure and characteristics of liquid water are influenced by the hydrogen bonding that forms in water clusters, creating a three-dimensional network of interconnected water molecules.