“Obviously, there's like dark social where they're looking on Slack and WhatsApp private groups that people can't really, you know, that marketers can't track as an example.”

“The phenomenon of untraceable social sharing via private channels like Slack or DMs.”

“The concept of untrackable social sharing and peer-to-peer influence.”

“The concept of content being shared in private channels like Slack or WhatsApp.”

“The concept of untrackable social sharing via private messaging apps like WhatsApp.”