A link in bio is a tool that allows users to share multiple links on social media platforms. Various outlets are providing guidance on how to use and master the link in bio feature on different platforms, including Facebook and TikTok, and some companies are launching their own link in bio tools. However, there is some uncertainty about the future of link in bio, with one report suggesting its era may be over, while another notes that a major platform has added official support for multiple bio links.