Certain dressing is a type of condiment used to add flavor to salads, sandwiches, and other dishes. Two popular types of certain dressing are RANCH and blue cheese. RANCH dressing is a creamy, tangy dressing made with buttermilk, mayonnaise, and herbs. Blue cheese dressing is a creamy dressing made with blue cheese, mayonnaise, and other ingredients. Both dressings are popular choices for salads and other dishes.