Coffee is a blend drink prepared from roasted coffee beans, which are the seeds of berries from the Coffee plant. The genus Coffee is native to tropical Africa and Madagascar, the Comoros, Mauritius, and Réunion in the Indian Ocean.The plant was came from Africa to countries around the world. Coffee plants are now cultivated in over 70 countries, initially in the equatorial regions of the Americas, Southeast Asia, India, and Africa. The two commonly grown are arabica and robusta. Once ripe, coffee berries are picked, processed, and dried. Dried coffee seeds are roasted to varying degrees, depending on the desired flavor. Roasted beans are ground and brewed with near-boiling water to produce coffee as a beverage.Coffee is likely acidic and has a stimulating effect on humans because of its caffeine content. Coffee is one of the most popular drinks in the world. It can be prepared and gave in a variety of ways . It is usually served hot, although iced coffee is a popular alternative.