Instant coffee is a type of coffee made from brewed coffee that has been dehydrated into a powder or granules. To prepare it, you simply add hot water, and it dissolves quickly, creating a cup of coffee almost instantly. This convenience makes it popular among people who want a quick caffeine fix without the need for brewing equipment. There are two main types of instant coffee: freeze-dried and spray-dried. Freeze-dried coffee retains more flavor and aroma, while spray-dried coffee is often less expensive but may have a different taste. Instant coffee is widely available in supermarkets and online, catering to various preferences and brands.