First-Click Attribution

First-click attribution assigns all conversion credit to the journey's first recorded touchpoint: the display ad, the podcast-driven search, the blog post that started everything gets 100%, and the nurturing and closing touches get nothing. It is last-click's mirror image — where last-click crowns the closer (the CLICK-THROUGH entry's branded-search harvest), first-click crowns the introducer — and like every single-touch model, it answers one question while pretending to answer all of them.

The model's question is genuinely useful: what introduces customers? Demand-creation channels — content, podcasts, upper-funnel video, the DEMAND-creation half the CONVERSION-PATH entry shows last-click starving — finally get statistical daylight under first-click, which is why analysts run it as a lens even where it never becomes the model of record. Its blindness is symmetric to last-click's: a journey introduced by a blog post, nurtured by six emails, and closed by a retargeting ad reads as 100% blog post, so optimizing to first-click alone overfunds awareness and starves the mid-and-bottom funnel exactly as last-click does the reverse. The mechanical caveats compound upstream: 'first' means first OBSERVED — tracking horizons, cookie lifespans (the FIRST-PARTY-COOKIE entry's seven-day cliff truncating journey starts), and cross-device gaps mean long journeys' true introductions routinely fall off the record, biasing 'first touch' toward whatever happened recently enough to see. The mature uses are comparative: first-click and last-click run as paired lenses (the gap between them maps each channel's role — introducer, closer, or both), DATA-DRIVEN attribution supersedes both where volume permits, and the model-of-record question resolves the way the CROSS-CHANNEL entry insists: no single-touch model deserves the job; the pair plus experiments do.

First-click matters as the demand-creation lens — budget reviews that only see last-click systematically defund introducers, and the first/last gap analysis is the cheapest channel-role map available. It matters most for content, audio, and upper-funnel programs whose work last-click renders invisible. The discipline is paired reading (never first-click alone), observation-horizon honesty about what 'first' can even see, and graduation to modeled-plus-experimental credit where the data supports it.

First-click arrived with web analytics' earliest model menus — the obvious mirror of last-click once journeys became visible — and survives the modeled-attribution era as a diagnostic lens: the introducer's view that, paired with the closer's, maps channel roles no single model shows.

Etymology: source.

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Areas of marketing where first-click attribution is a core concern: