Latest / Customer Journey with Fexingo: Touchpoints, Mapping, and Multi-Channel Marketing / How Customer Journey Maps Miss the Dark Social Sharing Moment
Transcript
- Lucas: Luna, I want to talk about a blind spot that's hiding in plain sight on almost every customer journey map. Luna: I'm ready. Which blind spot? Lucas: Dark social. The private sharing of links through messaging apps, email, encrypted channels that never shows up as a referrer in analytics. It's essentially invisible word of mouth. Luna: Right, the stuff people share in WhatsApp groups or iMessage threads. I've heard that a huge chunk of referral traffic is actually dark social, but most journey maps treat it as 'direct traffic' because there's no HTTP referrer header. Lucas: Exactly. A RadiumOne study from a few years back found that 84 percent of all outbound sharing happens through dark channels. And more recent data from 2025 suggests that share has only grown as messaging apps dominate communication. Yet when I look at a typical journey map, the 'sharing' touchpoint is often just a social media icon. It misses the real behavior. Luna: So if we're mapping a customer journey, we're basically ignoring the moment where a customer actually sends a link to a friend. That's a huge gap. Lucas: It is. And I think it's especially damaging for brands that rely on organic growth. Let me give you a concrete example. A few years ago, the direct to consumer mattress company Casper noticed that a large share of their new customers said they'd heard about the brand from a friend. But when they looked at their analytics, almost none of that showed up as referral traffic. It all landed under 'direct' because the friend had copied and pasted the link into iMessage or WhatsApp. Luna: That's the classic dark social problem. And Casper eventually figured it out, right? They started using shortened links with unique identifiers so they could track which channel a share came from, even if it didn't carry a referrer. Lucas: That's one approach. They used Bitly links with custom tags that, when clicked, would fire a server-side event that logged the original share method. But even that isn't perfect because if a user copies the link and pastes it elsewhere, you lose the tracking. The point is, they discovered that nearly 40 percent of their referral traffic was coming through dark social channels, mostly WhatsApp and iMessage. That's a massive touchpoint that their journey map had completely missed. Luna: Forty percent. That's a number that would change how you allocate budget for acquisition. If you think social media ads are driving most of your word of mouth when actually it's people messaging each other, you'd invest differently. Lucas: Exactly. And the journey map is the tool that should surface that insight. But most journey maps are built on observable data — clicks, page views, form fills. Dark social is inherently unobservable. So you have to build in a layer of inference. Luna: How do you infer something that's invisible? What's the framework? Lucas: I think there are three techniques. First, you run a controlled experiment: you create a unique shortened link for a campaign and distribute it only through specific dark social channels like a WhatsApp group. Then you measure the click-through and the subsequent behavior on your site. That gives you a baseline for how dark social traffic behaves differently from, say, Twitter traffic. Luna: So you can build a behavioral profile. Dark social visitors might have different session durations, different pages visited, maybe a higher conversion rate because they're coming from a trusted friend. Lucas: Right. Second, you add a post-purchase survey question that asks: 'How did you first hear about us?' And you list options like 'a friend sent me a link in a message' separately from 'social media post.' That gives you self-reported data on the dark social share. Luna: That's simple and effective. But it's self-selected — only people who convert answer the survey. Lucas: True. So the third technique is to look at the pattern of 'direct traffic' spikes. If you see a sudden increase in direct traffic that doesn't correlate with any ad campaign, email blast, or PR event, it's likely dark social. You can then dig into the landing pages and see if the content is something that would naturally be shared in a private message. Luna: That's a good detective method. But it's still inferential. You never get a perfect attribution. But maybe you don't need perfect. You just need to know that dark social is significant enough to include as a touchpoint in your journey map. Lucas: Exactly. And that's the key shift. Instead of having a single 'social sharing' touchpoint that defaults to Twitter or Facebook, you create two: 'public social sharing' and 'private social sharing.' And you treat them as separate stages because the customer's context is different. When someone shares a link in a WhatsApp group, they're usually having a conversation about a need. The recipient is primed to trust that recommendation. Luna: So the journey map should reflect that trust dynamic. It changes how you think about the post-purchase phase, too. If a customer had a great experience, they're likely to share it privately. So you should enable that — make it easy to share a link via WhatsApp or iMessage, not just through a social media button. Lucas: That's a great point. And there's a secondary benefit: by adding that private sharing touchpoint, you can also start testing what content drives dark social shares. Maybe it's a product page, maybe it's a review, maybe it's a comparison chart. Once you know, you can optimize for that. Luna: I want to circle back to something you said earlier about the RadiumOne study. That 84 percent number — is that still credible in 2026? I feel like with the rise of TikTok and Reels, public sharing might have increased a bit. Lucas: It's a fair question. Some newer studies from 2024 suggest dark social still accounts for around 70 to 80 percent of sharing, depending on the vertical. For B2B, it's even higher because a lot of sharing happens over email and Slack. But the overall point stands: dark social is the dominant sharing channel, and most journey maps pretend it doesn't exist. Luna: So if a marketing team wants to fix this, where do they start? What's the first step? Lucas: I'd say start with the post-purchase survey. Add one question that asks how the customer first received a link to your site. Include 'a friend or colleague sent me a link via messaging app or email' as an option. Run that for a month and see what percentage of responses you get. That number alone will tell you whether dark social matters for your brand. Luna: And if it's, say, over 20 percent, then you invest in building a more robust inference layer. Maybe implement link shortening with server-side tracking on key pages. Lucas: Exactly. And then you update your journey map. You add a new stage called 'Private Recommendation' or 'Dark Social Share' between the 'Consideration' and 'Conversion' stages. And you start measuring the lifetime value of customers acquired through dark social versus other channels. My bet is they'll have higher retention because they came with a built-in trust signal. Luna: That's a testable hypothesis. And I think it's the kind of thing that makes journey mapping much more valuable — it's not just a static diagram; it's a living model that forces you to look for the invisible. Lucas: Right. And speaking of making things better, I want to take a brief moment to mention something that supports this show. If these marketing conversations have sparked something you've actually used — maybe you've adjusted your own journey map after one of our episodes — we'd love it if you considered supporting the show on Buy Me a Coffee. It's a small gesture that helps us keep the podcast ad-free and focused on content like this. The link is simple: buy me a coffee dot com slash fexingo. Luna: Yeah, it genuinely makes a difference. Even a few dollars helps cover hosting and research time. And it keeps us independent. So if you've gotten value from the show, that's the way to give back. Lucas: Alright, back to dark social. One more technique I want to share: you can also use a URL builder that appends a unique parameter for each share channel. For example, you can create a custom link for WhatsApp, one for email, one for SMS. Then when someone clicks that link, you can see the source in your analytics as a campaign parameter. The trick is to make those links easy to copy and paste. Luna: But wouldn't that only work if you control the share? Most dark social sharing is organic — the customer decides to share your link. They might not use your custom link. Lucas: That's true. So you have to incentivize it. For example, you can offer a small discount for sharing a link, and you give them a unique referral link that's already tagged. That moves it from organic dark social to incentivized sharing, but it still gives you a window into the channel. Luna: And you can compare that data to the post-purchase survey to calibrate. It's not perfect, but it's a lot better than ignoring it. Lucas: Right. And I think the broader lesson is that customer journey mapping should always have a layer of 'unknown unknowns.' We design maps based on what we can measure, but the most important moments might be the ones we can't see. Dark social is a perfect example. By actively looking for it, we can turn an invisible touchpoint into a visible one. Luna: So for any marketer listening: if your journey map doesn't have a 'private sharing' node, it's probably incomplete. And that missing node could be where your best customers are coming from. Lucas: Absolutely. And if you want to dive deeper, we'll put some links on the show page for the specific techniques we mentioned. Next episode, we'll look at another blind spot: the 'post-purchase silence' gap where brands stop communicating after the sale. Luna: Looking forward to that. For now, I know I'll be rethinking my own share buttons.