To activate, launch, or make something operational and available to users, especially in technology or media contexts.
From broadcasting terminology (1940s) where programs went 'live' on air in real-time. Extended to computing and business in the 1990s with the rise of websites and digital systems that could be switched from development to active status.
The phrase captures the thrilling moment when something transitions from preparation to reality - there's no going back once you're live. It perfectly embodies our digital age where the flip of a switch can instantly expose your work to millions of users worldwide.
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