The third-person effect, also known as “Third-person perception” and “Web Third-person effect,” is the commonly held belief that other people are more affected, due to personal prejudices, by mass media than you yourself are. This view, largely due to a personal conceit, is caused by the self-concept of being more astute and aware than others, or of being less vulnerable to persuasion than others.
As an example you are listening to a political speech where the politician espouses views other than yours. Afterwards, you can feel superior to other persons who share the politicians’ views because of a sensation of being right, and thus more intelligent than aware than those others.