In short- Urea-Z is a urine odor eliminator. This means that the product removes the smell of urine safely and naturally. The microbes in the formula eat the urine crystals in the dog or cat urine, eliminating the urine odor. The formula is a unique blend of little microbes that are activated by water and fed by urine crystals. This allows you to live happily with your furry friends without having to endure the stink!