1. Distillation is to separate two substances according to their boiling points. In spirits making, distillation is where the alcohol is separated and removed.
2. Fermenting grain results in an alcohol concentration of roughly 5-10 percent. Human beings are not satisfied about this because they want a higher alcohol concentration, which will get them excited. That is the purpose of distillation.
3. Distillation is often achieved with stills: pot stills, column stills, and hybrid stills.