The phrase "official launch" refers to the formal or public introduction of something, like a product, service, or event, to the public. It signals that the thing being launched is now available or accessible to people. Full definition
Similar and related words and phrases are presented below.
There is no word on official launch dates or their pricing. (techandroids.com)
In order o celebrate the launch, the above - mentioned pair also released a brand - new, official launch trailer of their game. (playstationenthusiast.com)