A 'hard launch' is publicly and unambiguously revealing a relationship — usually by posting a photo with your partner clearly visible and tagged on social media. The opposite is a 'soft launch', where partners are hinted at (a hand in a photo, an arm across the table) without confirming. If your teen 'hard launches' a partner online they are making the relationship official to friends and family. Harmless dating vocabulary; reflects how young people manage privacy.