What are social norms for politics or society?
can someone me with a politic from today

From a sociological perspective, social normsare informal understandings that govern the behavior of members of a society.[1] Social psychology recognizes smaller group units, such as a team or an office, may also endorse norms separately or in addition to cultural or societal expectations.[2] In other words, norms are regarded as collective representations of acceptable group conduct as well as individual perceptions of particular group conduct.[3] They can be viewed as cultural products (including values, customs, and traditions)[4] which represent individuals' basic knowledge of what others do and think that they should do.[5]

Furthermore, in the field of social psychology, the roles of norms are emphasized which can guide behavior in a certain situation or environment as "mental representations of appropriate behavior".[6] For example, it has been shown that normative messages can promote pro-social behavior, including decreasing alcohol use[7] and increasing voter turnout [8] and sustainability.[9][10] According to the psychological definition of social norms' behavioral component, norms have two dimensions: how much a behaviour is exhibited, and how much the group approves of that behavior.[2] Both of these dimensions can be used in normative messages to alter norms and subsequently alter behaviors; for example, a message can target the former dimension by describing high levels of voter turnout in order to encourage more turnout. At the same time, norms also can be changed contingent on the observed behavior of others (how much behavior is exhibited). In fact, in Sherif (1936), one confederate was able to affect the development of a group norm related to the autokinetic effect.[clarification needed]

He's right there.