The answer to 'floor stained' is that there are several common causes, including spills, tracked-in dirt, pet accidents, and even wear and tear over time. Symptoms can include discoloration, staining, or a dull appearance. The best solution depends on the type and severity of the stain.
For minor stains, you may be able to remove them yourself using a cleaning product designed for the floor type, like a wood floor cleaner or tile/grout cleaner. However, for more stubborn or set-in stains, it's often best to call in a professional cleaning service. They have the expertise and equipment to safely and effectively clean and restore your floors without causing further damage.