Despite widespread norms against the expression of prejudice, violations still occur. When they do, those witnessing the violation must decide whether to confront the individual expressing prejudice. Confrontations are associated with a host of positive outcomes, including reducing the likelihood of future biased behaviour, improving the well-being of members of the targeted group, and shifting broader norms around the appropriateness of expressing. Here we review the factors promoting confronting behaviour and how confronting impacts those involved.