According to reports from Motherboard ,Invitations to WhatsApp group chats are being indexed by Google, making the invite links —including links to private group chats — discoverable and available to anyone who wants to join,  Journalist Jordan Wildon tweeted that that he discovered that WhatsApp’s “Invite to Group Link” feature lets Google index groups, making them available across the internet since the links are being shared outside of WhatsApp’s secure private messaging service.

Group admins can invalidate a link to a chat if they want to, but Wildon says he discovered that, in those situations, WhatsApp only generates a new link; it doesn’t necessarily disable the original link. WhatsApp group links come with warnings attached, reminding the person who generates the link only to share it with people they trust.

Facebook / WhatsApp spokesperson Alison Bonny said in an email to The Verge  that “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,” adding that “links that users wish to share privately with people they know and trust should not be posted on a publicly accessible website.”

Danny Sullivan ,public liaison for Google tweeted  that “Search engines like Google and  others list pages from the open web. That’s what’s happening here. It’s no different than any case where a site allows URLs to be publicly listed.” He included a link to directions in Google’s Help Center for blocking content from being included in  the search results.