A micropub, according to the micropub association, is defined as follows: "A micropub is a small freehouse which listens to its customers, mainly serves cask ales, promotes conversation, shuns all forms of electronic entertainment and dabbles in traditional pub snacks".

There may be differences between the pubs; they may or may not have a bar, they might serve beer straight from the cask or through hand pumps. They share a philosophy: a simple pub with a focus on cask beer and conversation for entertainment, with the basic premise of KIS, KIS – Keep It Small, Keep It Simple.