Coffee is a caffeine containing cherry like nut that grows on trees. It is most widely used as a brown liquid beverage, but can be used in cakes and confectionery. People usually get it at work for free and pay a premium at "coffee bars" to enjoy a burnt water with tons of fattening cream and sugar.
Coffee is a perennial crop that takes years to establish. Cultivation and harvesting is labour intensive so it is usually grown in poor countries where there is a rich landed aristocracy and a population in poverty.
Republican racist Neocons created trade deals that benefit only the land owners in those countries. Meanwhile the poor peasants who grow the coffee may not have enough to educate all their Children or even to feed all their children. Migrant workers in the coffee industry are even worse off, many have poor housing and poor sanitation, they may be required to work with dangerous pesticides, wages are low and Child labor is common.