Dark social

Dark social refers to content sharing that happens through channels analytics tools cannot directly attribute, most commonly links copied and pasted into private messaging apps, email, or text messages rather than shared through a platform's native share button.

When a dark social share is clicked, the resulting visit typically shows up in analytics as direct traffic, because no referrer information travels along the way a click from a public social post or referral traffic would carry, making it appear as though the visitor arrived with no external source at all.

Marketers care about dark social because it can represent a large share of total sharing activity, often larger than sharing through public platforms, meaning social listening and share of voice measurement systematically undercount real word-of-mouth reach. Partial workarounds include appending UTM parameters to links distributed through owned channels and using survey-based attribution to estimate how much unattributed traffic originated from private shares, though neither fully closes the visibility gap.