Social audience duplication refers to the phenomenon where a person or group of people follow and engage with the same content or accounts across multiple social media platforms. This can occur when individuals have similar interests or when a brand or influencer has a strong presence on various platforms. It can also be a result of cross-promotion or sharing of content between different social media channels. Social audience duplication can be beneficial for businesses and content creators as it allows them to reach a wider audience and increase their online presence. However, it can also lead to repetitive content and a lack of diversity in the social media landscape.