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In the last article, I wrote about the modern website clutter problem. The broader point was that websites have become crowded with prompts, widgets and floating tools that compete for attention. Navigation deserves its own discussion because it sits right at the centre of that problem. When navigation is unclear, hidden, overly complex or poorly labelled, people do not just find the experience annoying. They find it harder to move forward. And when it becomes harder to move forward, conversion suffers. You can read the previous article here: The modern website clutter problem.
This is where a lot of digital teams get the diagnosis wrong. They treat navigation as a design detail, something to tidy up later, or something secondary to the real conversion elements like forms, offers and calls to action. The research points in the opposite direction. Navigation influences discoverability, task completion, cognitive effort, trust and purchase intention. In other words, it shapes the conditions that make conversion more or less likely in the first place.
When people cannot find the path, performance drops
One of the clearest findings comes from Nielsen Norman Group’s quantitative usability study of 179 participants across six live websites. When navigation was hidden, desktop users used it in only 27% of cases, compared with 48% to 50% when navigation was visible or partly visible. The same study found that hidden navigation reduced content discoverability by more than 20%, increased perceived task difficulty by 21%, and made desktop task completion at least 39% slower. That is not a cosmetic difference. That is a measurable reduction in people’s ability to find what they need and move through a site confidently. Nielsen Norman Group’s research on hidden navigation and hamburger menu usability is one of the strongest pieces of evidence here.
It is worth pausing on that point. Conversion does not begin at the form fill or checkout click. It begins earlier, when a visitor decides whether the path ahead looks obvious enough to continue. If the route is hidden, ambiguous or effortful, users do what humans usually do in those moments. They hesitate, look for alternatives, or leave. A slower journey is not just a slower journey. It is a weaker one.
Complexity creates disorientation, and disorientation has a cost
Academic research on navigation complexity helps explain why. In an experimental study on web information gathering, longer path length and lower path relevance reduced accuracy, increased response times and increased lostness during navigation. The same study found that sequential menus created more disorientation than expandable menus, especially when tasks were more complex. The practical conclusion was straightforward: as navigation paths become deeper and labels become less relevant to the user’s goal, people feel more lost and perform worse. This is explored in the study Effects of navigation menus on navigation performance in web information seeking.
That matters commercially because many websites unintentionally create exactly these conditions. A visitor lands on a page with several possible routes, inconsistent labels, multiple competing prompts and no strong sense of what sits behind each click. At that point, the site is no longer helping them make progress. It is asking them to work it out for themselves. The friction is often subtle, but the mechanism is clear. More effort leads to less momentum.
Good navigation reduces thinking, not just clicking
Another useful concept here is information scent. This is the degree to which a label, heading or navigational cue helps a user predict what they will get next. In an empirical study based on a live ecommerce application, perceived information scent showed a strong correlation with system usability. Put simply, when people can better predict where a path leads, the system feels easier to use. When they cannot, uncertainty rises. You can see this in the paper Assessing usability through perceptions of information scent.
This helps explain why poor navigation hurts conversion even when all the right elements are technically present. A site can have the right pages, the right offer and the right CTA, but if users cannot confidently predict where to go next, the journey still breaks down. Navigation is not only about access. It is about confidence. It tells people whether the website makes sense.
Structure matters more than many teams think
There is also evidence that the underlying structure of navigation affects usability. In a Decision Support Systems study, usage oriented or combined hierarchies produced significantly higher usability than subject oriented hierarchies across both simple and relatively complex tasks. That is an important finding because it suggests that navigation performance is not just about visual treatment or menu style. It is also about whether the site is organised in a way that matches the user’s job to be done. This is covered in the research paper The impact of website structure on navigation performance and perceived usability.
This is where many businesses accidentally optimise for internal logic rather than user logic. Teams label sections based on departments, product lines or internal terminology, then wonder why visitors do not move through the site cleanly. Users are not trying to understand your org chart. They are trying to complete a task. The closer your navigation maps to that task, the less friction the journey contains.
Trust is part of the conversion equation
Navigation also affects trust, which is often overlooked in conversion conversations. Research on website design and purchase intention found that navigation design had a significant effect on trust, and that website design factors including navigation design contributed to purchase intention partly through trust. In the same paper, the authors concluded that navigation design can be used as a marketing tool through which trust in the website is created and purchase intention is enhanced. The paper The effect of website design on purchase intention in online shopping connects navigation directly to trust and buying intent.
That is an important bridge between UX language and commercial language. Poor navigation is not only inefficient. It can make a site feel uncertain, harder to interpret and less dependable. On a brochure site, that may mean fewer enquiries. On an ecommerce site, it may mean fewer purchases. On a lead generation site, it may mean more abandonment before the high intent moment is ever reached.
The scale of the problem is bigger than individual menus
Large scale ecommerce research points in the same direction. Baymard’s 2024 Product Finding research involved more than 5,550 research hours and 219 moderated usability sessions across 12 sites, uncovering more than 1,000 medium to severe product finding issues. Their work spans homepage and category navigation, on site search, product lists and filtering, which is useful because it shows the problem is not one isolated UI choice. It is systemic. When product finding breaks down, commercial journeys break down with it. Baymard’s 2024 Product Finding research study is especially useful on this broader point.
This is why poor navigation should be understood as a conversion issue, not just a usability issue. It reduces discoverability. It increases effort. It creates disorientation. It weakens information scent. It can undermine trust. None of those things are good for conversion, and together they create a very predictable outcome: fewer people reaching the point where they are ready to act.
Simpler journeys usually outperform noisier ones
The lesson is not that every site needs fewer pages or a radically stripped back interface. It is that users need a clearer path. They need to see what matters, understand what sits behind each option and move through the journey without second guessing the interface. Good navigation reduces the amount of thinking required. Bad navigation pushes that work back onto the user.
For businesses focused on growth, that should change how navigation is prioritised. It is not background chrome. It is part of the conversion system. If your website feels harder to move through than it should, if key actions are buried, if labels are vague, or if too many interface elements compete with the main path, you do not just have a UX cleanliness problem. You may have a revenue problem hiding in plain sight.
The websites that perform best are rarely the ones asking for attention from every corner of the screen. They are the ones that make the next step feel obvious. And that starts with navigation.
