Most herbs come in two forms: Dried and Fresh. What's the difference between them?
(Picture of Fresh Basil)
(Picture of dried basil)
Example: If a recipe calls for one tablespoon of fresh basil, but you only have dried basil, then you use one teaspoon of dried basil (three teaspoons = one tablespoon. One teaspoon is 1/3 the amount of one tablespoon).
Dried herbs have a different flavor and aroma that fresh. For example, dried basil has more of a smoky, deep flavor, while fresh basil is more minty and lemony. Fresh oregano has a softer, herbaceous flavor, while dried is strong and intense.
Experiment with different herbs to see which ones you like.
Source: The Starter Cook by Linda Johnson Larsen