The phrase "major announcement" means a very important and significant piece of news that is going to be revealed or shared with others. Full definition
Here, you'll reinforce your brand, encourage sales, offer exclusive content, make major announcements, interact with your fans, and build your audience. (webdesignrelief.com)
Many major announcements in the industry also contributed to this high gain in price across the board. (coinstocks.com)
There is probably a positive effect from the company being on its own at the event, with no particular major announcement from its console competitors at the same time. (icopartners.com)