What is the purpose of blanching in cooking and how does it enhance the final dish?

Blanching is a cooking technique where food is briefly boiled and then immediately cooled in ice water. The purpose of blanching is to partially cook the food, which helps to preserve its color, texture, and flavor. It also helps to remove any impurities or strong flavors. Blanching enhances the final dish by ensuring that the food retains its vibrant color, firm texture, and fresh taste.