Link in bio
The single clickable link a profile allows, used to route followers to a site, landing page or list of destinations.
Link in bio is the one clickable URL most profiles allow, usually pointing at a site, a signup page or a small hub of further links. Because platforms throttle links inside posts, the bio link is often the main door from social to your product.
It pairs with a strong handle and a clear call to action: the post earns attention, the CTA says where to go, the bio link delivers them. Tag it so you can measure the click-through rate it actually drives.