Duplicate conversions refer to the occurrence of multiple instances of the same conversion event within a given time period or across different channels. This can happen when a user completes the same action more than once, such as making a purchase or filling out a form, resulting in duplicate data being recorded. Duplicate conversions can skew conversion metrics and make it difficult to accurately measure the success of a marketing campaign. It is important for businesses to identify and eliminate duplicate conversions in order to obtain accurate and reliable data for decision-making.