Floor tile is made to be thick and sturdy so it can withstand foot traffic. Meanwhile, wall tile is thinner and lighter for easier installation. Some floor tiles can be installed on walls, depending on the size and weight, though you should consult a professional before choosing to install floor tile on your walls.
They can also be more decorative, with unique finishes and 3D textures that wouldn’t be practical for flooring. Wall tiles are also more likely to be smaller than floor tiles, since mosaics and backsplash wall tiles are so popular.