Dark social refers to content shared through private, untrackable channels — text messages, direct messages, email forwards, WhatsApp groups, Slack channels, and private Discord servers. The term was coined by Alexis Madrigal in The Atlantic in 2012, and the share of traffic it represents has only grown since.

Why It Matters

Studies estimate that 80% or more of social sharing happens through dark social channels. When someone texts a friend a link to an article, that click shows up in analytics as "direct traffic" — not as a social referral. This means brands dramatically undercount the social reach of their content.

PR Implications

A press hit that generates modest public engagement (likes, shares, comments) may be circulating widely through private channels. Campaign measurement that relies solely on public social metrics misses the majority of actual sharing behavior.

Measurement Approaches

UTM parameters, shortened links with tracking, "How did you hear about us?" surveys, and platforms like GetSocial or ShareThis offer partial visibility. But dark social is, by definition, resistant to full measurement — the best approach is to acknowledge the gap and adjust expectations accordingly.

AI Parallel

AI-generated answers are a new form of dark distribution. When a buyer asks ChatGPT "best CRM for small business" and gets an answer that includes your brand, that referral is invisible to traditional analytics. The AI answer is the new dark social.