Handle

In the social-media context, a 'handle' is the unique username or identifier given to a person, brand, business, or other entity within a social-media space that typically begins with the '@' symbol; it serves as a digital business card—a nonsensical phrase some might consider polite to use when passing off an acquaintance on the street, but one that's critically important to the identity of any entity on social media. A handle can almost always be customized, meaning that at the moment an account is set up, the user has the chance to exercise creativity, come up with something nonsensical that reflects their off-the-wall nature, or choose a nickname that's been with them since childhood when making this digital signage. It should go without saying that whatever is chosen should be remembered by the user at least long enough to get to the next social-media interface.

Platforms such as Twitter (now X), Instagram, TikTok, and Facebook see using handles as normal, intuitive. You only have to remember the handle to find you.