A "link in bio" refers to the link in a social media profile, often used on Instagram and TikTok where clickable links are not available in captions. To add a link in bio on TikTok, users need to switch to a Business account, which is free and simple to do. On Instagram, any account type can add a link to their bio, with up to five external websites allowed. There are various tools and methods for creating a dedicated link in bio page, including social media management tools like Later and Buffer, specialized tools like Linktree and Milkshake, landing page builders like Carrd and Leadpages, and even using an existing website. When choosing a method, consider how it will fit into the customer journey with your brand and make automating social media management easier.