Juice grooves are deeply carved parts around the edges of the slicing boards, and they are designed to hold and keep the liquids and juices coming out from the meats, vegetables, and poultry chopping them. They keep your countertop clean all the time and let you pour the liquids in the right in the sink, enhancing the hygiene in your kitchen and saving the time and effort you would spend on cleaning and sanitizing your table. So it is recommended to buy the boards that have deep grooves.