Surface tension is the tension of the surface film of a liquid caused by the attraction of the particles in the surface layer by the bulk of the liquid.
The cohesive forces between molecules in a liquid are shared with all neighboring molecules.
Surface tension is important because fluid surface tension is the tangential force that keeps a fluid together at the air/fluid interface.
A beach ball floating on water is a great example of surface tension.
Surface tension allows light objects to float on water. For example, when a water dome was made in the petri dish, paper clips were able to float on the water surface. Due to the great attraction between liquid molecules, surface tension is created.