Scaling a funnel with friction in it does not remove the friction. It amplifies it. Every pound spent driving traffic to a broken conversion path is a pound that does not produce the result it should. The most expensive growth mistake is paying to scale before the underlying funnel is working.
What funnel friction actually looks like
Friction is anything that makes it harder for a customer to do what you want them to do. A sign-up form with too many fields. A pricing page that does not answer the question a customer is asking. An onboarding flow that asks for information before delivering any value. A product that takes more than one session to become useful.
Some friction is obvious from the data: a page with a high exit rate, a step in the onboarding flow where a large percentage of users stops. But the most damaging friction is often invisible in aggregate metrics because it affects a proportion of users distributed across many steps rather than creating a single dramatic drop-off point.
Where to look for it
Start at the bottom of the funnel and work up. The question at each stage is: of the people who reached this point, what proportion did not complete the next step, and do we understand why?
Session recordings are one of the most direct tools for identifying friction. Watching real users navigate a flow reveals hesitation, repeated actions, and exit points that aggregate analytics obscures. Five to ten recordings of users who dropped off at a specific step will usually surface a pattern that explains the drop-off.
Exit surveys on key pages, even a single question asking why someone is leaving, produce qualitative data that tells you the reason rather than just the fact of drop-off. The reasons are almost always more interesting and more actionable than the rate.
The fixes that tend to produce the most impact
Reducing the number of steps between arriving and experiencing first value tends to have the largest impact on early funnel friction. Every additional field, screen, or decision between sign-up and the first moment of genuine value is an opportunity to lose someone.
Aligning the promise in acquisition messaging with the reality of the experience is the other high-impact fix. When a customer's expectation, set by the ad or the website, does not match what they encounter after clicking, the mismatch is a form of friction that no amount of onboarding optimisation will solve. The fix has to happen upstream, in the messaging.
Fix the funnel before paying to scale it. The most expensive thing in growth is acquiring a customer who was always going to churn because the experience was broken.