Using a cutting board protects your knives, prevents damage to your countertops or plates, and helps maintain a sanitary food preparation environment.
Cutting directly on a plate or countertop can cause several problems. First, hard surfaces like granite or ceramic will quickly dull your knives. The blade will lose its sharp edge as it scrapes against the unforgiving material. Second, you risk damaging the countertop or plate itself. Knives can scratch, chip, or even crack these surfaces, leading to costly repairs or replacements. Finally, countertops and plates are often difficult to clean thoroughly and can harbor bacteria in the scratches and grooves created by cutting. A dedicated cutting board, especially one made of wood or plastic, provides a softer, more forgiving surface for your knives, is easier to sanitize, and protects your kitchen surfaces.
Use separate cutting boards for raw meats and produce to prevent cross-contamination. Color-coded cutting boards can help you easily distinguish between them.