Decaf coffee is coffee that has undergone a process to remove most of its caffeine content, typically leaving behind only about 1-3% of the original caffeine. It retains much of the flavor profile of regular coffee, with rich, roasted, and sometimes slightly nutty or chocolatey notes. The taste can vary depending on the beans and the decaffeination method used, but decaf tends to be smoother, with less bitterness compared to regular coffee. It offers the experience of coffee without the stimulating effects of caffeine.