What does it mean if a Supreme Court decision is a "per curiam" opinion?

A "per curiam" opinion signifies that the decision represents the opinion of the Court as a whole, rather than attributing the opinion to a specific justice or justices. This type of opinion is typically brief and provides a straightforward resolution to the case at hand. It reflects a consensus reached by the Court, which may also indicate that the issues are either not particularly complex or that the Court feels a united stance is essential for clarity and authority.

This contrasts with other types of opinions, such as those authored by individual justices, which may detail a single justice's reasoning or interpretation of the law. By using the term "per curiam," the Court underscores its collective judgment on the matter, which can enhance the perceived legitimacy and weight of the decision among lower courts and the public.