Adjusting your opinions, judgments, or behavior so that they match the opinions, judgments or behavior of other people or the norms of a social group or situation is called:

Conformity.

Explanation:

Conformity is a tendency to change our beliefs or behavior in order to be accepted by other people.Our actions are often influenced by other people's expectations, and social norms. This is a type of social influence, and can be a consequence of real or imagined group pressure. People often decide to follow social trends, rather than pursue their own desires. They are afraid that they will be rejected by others if they show individuality.Conformity is largely present in schools, due to peer pressure. For example, a teenage girl decides to dye her hair because the majority of her friends have done so.