The definition of a Micropub is difficult. It is a set of ethics rather than a set of rules.
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. But they are united in one philosophy. A simple pub with the focus on cask beer and conversation for entertainment. The basic premise is KIS, KIS – Keep It Small, Keep It Simple.