What does "slip-resistant" actually mean and in which areas must such tiles be used?

To a large extent, no regulations apply as yet in the area of private use, e.g. private bathrooms or kitchens, although there is a growing demand here for tiles offering a degree of slip resistance. For safety reasons, in the case of showers that are flush with the floor in private bathrooms, Villeroy & Boch recommends implementing the requirements for public areas.