A commercial floor has to cope with far more than a domestic one. These are the main things to think about.
Material
Porcelain is the most common choice. It's dense, very low in water absorption and hard-wearing. Quarry tiles are a traditional, tough option for kitchens and back-of-house areas. Natural stone can look superb but varies widely in hardness.
Slip resistance
Match the slip rating to the area: entrances and washrooms need more grip than dry corridors, and kitchens need more again. See our guide to slip ratings for the details.
Wear and footfall
Through-body or coloured-body porcelain hides wear better than glazed tiles in very busy areas, because chips and wear don't show a different colour underneath.
Size and format
Large-format tiles mean fewer grout lines and a clean look, but they need a flatter base. Smaller tiles can follow falls to drains more easily.
Cleaning and maintenance
Consider how the floor will be cleaned. Textured anti-slip tiles hold more dirt, and grout choice affects how clean the floor stays.
This guide is general information. Always follow the tile, adhesive and product manufacturers' instructions for your specific project.