to change the seasonings in a cooked dish by adding salt and pepper, herbs, lemon juice, and so on, after you have tasted the dish and determined that it needs more flavoring.
To change the seasonings in a dish by adding a spice, herb, and so on, after you have tasted the dish to see if it needs more flavoring.
in cooking, the term means the cook must taste before serving, and add seasonings to suit his or her own sense of what the right flavor is