Soaps and Detergents consists of a large Hydrocarbon tail with a positively charged head. The Hydrocarbon tail is negetively charged and water repelling (Hydrophobic) and the positive cahrged is water loving (Hydrophilic).

Inside water the soap molecule forms a cluster called micelle in which the Hydrophobic tail is in the interior of the cluster and the hydrophilic (ionised) part is on the surface of the cluster. The oily dirt will be collected in the centre of the micelle. The micelle will not form precipitate by coming together and due to ion -  ion repulsion, the suspended dirt particles can be easily washed off.

Hope it helps

Please mark me as Brainliest