We use bathroom wall tiles as a category unique to bathrooms themselves.  All bathrooms run the intense rick of collecting germs, smells and other odious characteristics.  The fact is, we use tiles in bathrooms to relieve all this. Naturally, bathrooms also contain and hoard all the condensation from baths and showers and sink washing as well We shut the doors and trap all that amazing amount of moisture, providing not only a Petri Dish for bacteria but also damaging any porous surface such as sheet rock or wood.  These constructions will rot over time from the constancy of the water.

Meanwhile, tiles walls suffer from no such ailment.  Certainly, grouting needs to be replaced or freshened up in due time for literally everyone. But the tiles themselves clean remarkably easy and they are so nonporous that they also serve to insulate. Needless to say, their hardness and impermeability make them last for a much longer period of time as well.
The other true benefit of bathroom wall tiles are the simple or even complex beauty they offer. Children delight in the colorful tiles of primary colors and even the most sophisticated adults can have their breath taken away looking at some of the more modern tile options.  It has truly bloomed, the entire bathroom wall tiles area, into an amazing array of colorful, unique and simply gorgeous possibilities.