Unglazed tiles are more slip- scratch-resistant than glazed tiles, offering a less shiny, often matte appearance. Typically, unglazed tiles are more porous, making them more susceptible to absorbing water, oil, or dirt. Glazed tiles usually have a shiny finish, although it's worth noting that they can also be found with a matte glaze.
Glazed tiles have an extra layer of liquid glass applied to the top. Glazed tiles also come in a larger variety of colors and styles than unglazed and are more stain-resistant.