Each handle has a unique URL, with the handle added after twitter.com. With the hashtag #MyHandleExplained trending on Twitter, here are some of the users' reasons.
Twitter handle is not the same as your display name, which is a "personal identifier (sometimes a business name or real name) displayed in your profile page and used to identify you to friends, especially if your username is something other than your name or business name." And, of course, these are different from your Twitter bio.
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