Process of making instant coffee starts from a strong coffee drink which is the freeze- dried to remove all the liquid from the drink. What is left is the dried coffee so in other words the instant coffee powder.
Instant coffee can be brewed as its name states instantly. Instant coffee powder can be measured straight to the water and the drink is ready after a few stirs with a spoon. Instant coffee can be good option if you want to enjoy a cup of coffee fast.