Why misinformation must not be ignored.

This article refutes claims that misinformation is an insignificant issue. Through a critical literature review, we demonstrate that misinformation represents a nontrivial part of the information environment and can causally and adversely influence people's beliefs, decisions, and behaviors. We clarify through our discussion why misinformation continues to be a significant problem that should not be ignored by communicators and policymakers. (PsycInfo Database Record (c) 2025 APA, all rights reserved) Recent academic debate has seen the emergence of the claim that misinformation is not a significant societal problem. We argue that the arguments used to support this minimizing position are flawed, particularly if interpreted (e.g., by policymakers or the public) as suggesting that misinformation can be safely ignored. Here, we rebut the two main claims, namely that misinformation is not of substantive concern (a) due to its low incidence and (b) because it has no causal influence on notable political or behavioral outcomes. Through a critical review of the current literature, we demonstrate that (a) the prevalence of misinformation is nonnegligible if reasonably inclusive definitions are applied and that (b) misinformation has causal impacts on important beliefs and behaviors. Both scholars and policymakers should therefore continue to take misinformation seriously. (PsycInfo Database Record (c) 2025 APA, all rights reserved)