To go live means for a system, campaign or project to become available to the public to use or for consumption. For example, ‘our website goes live at the end of the month’. In broadcasting or streaming, to ‘go live’ means to record something at the same time as an audience are watching. For example, we will go live on our Instagram page on Wednesday.

1. Due to a number of hiccups, the technical team realised that the product wasn't ready to go live yet,and so they scrapped the launch date.
2. I prefer to pre-record my YouTube videos rather than go live, that way if I make a mistake I can record it again or edit it out.

1. The company's outmoded website was taken down so that it could be updated. The new, enhanced website is expected to go live early next month.
2. The office's new computer system went live yesterday, but it did not go exactly to plan. IT are currently trying to iron out a few of the wrinkles.