Bandwagon

The bandwagon fallacy occurs when an argument is made based on the popularity of a belief or action rather than its merit. This fallacy suggests that if many people believe something, it must be true, which is not necessarily the case.

For instance, claiming that a product is the best because it is the best-selling item is a bandwagon argument. Popularity does not equate to quality or truth, and it is essential to evaluate claims based on evidence rather than consensus.