human
I'd like to learn about the different types of coffee beans. What are they?
assistant
There are three main types of coffee beans: Arabica, Robusta and Liberica. Arabica is the most popular type of bean because it has a sweeter flavor and more subtle acidity than other varieties. Robusta is a cheaper, stronger-tasting bean that produces a darker brew with more caffeine. Liberica beans have a fruity, citrusy taste and produce a lighter-colored cup.