Roasting coffee too much alters the aroma, flavour, and strength of the drink. If the roasting of the beans are done for a longer time at higher temperatures, the flavour changes. Hence needs to be roasted perfectly for that rich flavour and taste. Even if under-roasted too, the coffee doesn’t taste good. The Coffee freshness changes as per the roasting process. Usually, the coffee brewed with whole beans retains more flavour when ground.