Borax is a naturally occurring mineral, also known as sodium borate. It is commonly used in household cleaning products, laundry detergents, and as a pest control agent. Borax helps to soften water, making it more effective for cleaning and removing stains. In addition to its cleaning properties, borax is often used in crafts, such as making slime, due to its ability to create a gel-like texture. It can also be found in some cosmetics and fertilizers. However, it's important to handle borax with care, as it can be harmful if ingested or used improperly.