“Like all content that is shared in searchable, public channels, invite links that are posted publicly on the internet can be found by other WhatsApp users,” a spokesperson for the company said.
“Links that users wish to share privately with people they know and trust should not be posted on a publicly accessible website.”
WhatsApp sends a notification to everyone in the group chat when someone new is added – so you’ll be aware if your invite link has been shared and a random Google searcher has cropped up in your University Mates chat from the mid-00s.
source: express.co.uk