Vinaigrette is a type of salad dressing made by mixing oil and an acidic ingredient like vinegar or lemon juice. It can be enhanced with salt, herbs, and spices. Vinaigrette is commonly used as a salad dressing but can also be used as a marinade. The document provides instructions for making a vinaigrette dressing including combining olive oil, vinegar, maple syrup, and salt in a jar. It also outlines the procedure for preparing a green salad by tossing mixed greens with the vinaigrette and optionally adding toppings like nuts, dried fruit, and cheese. Maintaining proper preparation techniques is important for ensuring the salad has crisp greens and maximum flavor from the dressing.