A founder asked me why 42% of sessions on his B2B tool were tagged Direct. "Are that many people really typing my URL?"
Almost none were. Direct is GA4's junk drawer: it's where sessions land when the referrer is stripped. The clue was in the landing pages report. Direct sessions were piling onto deep blog URLs nobody memorizes, like /blog/api-rate-limit-guide.
That fingerprint means untagged links: a newsletter, a PDF, an app, or HTTPS-to-HTTP hops losing the referrer.
The change: we added UTM tags to every newsletter link and the in-app share button.
The result: Direct fell from 42% to 26% in six weeks, and Email surfaced as a real channel driving 18% of demo requests, previously invisible.
The team had been crediting "word of mouth" for what was actually their own newsletter.
Lesson: high Direct to deep pages isn't loyalty. It's untagged links hiding your best channel inside the junk drawer.
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"What is all this 'Direct' traffic?"
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