Active Dry Yeast is a type of yeast used in baking to help dough rise. It is made from live yeast cells that are dehydrated, allowing for a longer shelf life. When mixed with warm water and sugar, the yeast becomes active and begins to ferment, producing carbon dioxide gas that causes the dough to expand. This yeast is commonly found in packets or jars and is easy to use. It is ideal for making bread, rolls, and other baked goods. Proper storage in a cool, dry place can help maintain its effectiveness for future baking projects.