A successful website is about much more than creating an attractive design. While visual appearance plays an important role in creating a strong first impression, the most effective websites are built around understanding how users think, behave, and interact.
When a visitor lands on your website, they’re making decisions constantly. Can they find the information they need? Do they understand what your business offers? Is it clear what action they should take next?
These decisions are influenced by psychology and user behaviour, which is where user experience (UX) principles come in.
UX laws provide businesses and designers with a framework for understanding how people interact with digital experiences. By applying these principles throughout the website design process, businesses can create websites that are easier to navigate, more engaging, and more effective at achieving their goals.
In this blog, we’ll explore some of the most important UX rules and website design laws businesses should keep in mind, and explain how they can be applied to create better digital experiences for their audience.
What are UX laws and why are they important?
UX laws are principles based on psychology, human behaviour, and usability research that help explain how people interact with websites and digital products.
They’re not strict rules that every website must follow, but rather guidelines that help businesses and designers make better decisions about how websites should be structured, designed, and developed. Many UX principles are based on research into how users process information, make decisions, and navigate digital experiences.
By applying proven web design laws, businesses can create experiences that:
- Improve usability – make it easier for visitors to find information and complete important actions.
- Increase engagement – encourage users to explore more content and interact with your brand.
- Build trust – create professional, consistent experiences that strengthen credibility.
- Support conversions – guide users towards actions such as enquiries, purchases, or sign-ups.
UX should be considered throughout the entire website process – from planning the structure and content, through to design, development, and optimisation. When applied effectively, these principles help businesses create websites that aren’t only visually appealing, but also purposeful and focused on user needs.
10 UX rules that influence effective website design
Understanding user experience rules allows businesses to make more informed decisions when planning a website project. The below principles influence everything from navigation and page layouts, to calls-to-action (CTA) and content structure.
1. Fitts’s Law: Make important actions easy to complete
Fitt’s Law explains that the time required to interact with an element depends on its size and distance. In simple terms, larger and easier-to-access elements require less effort from users.
When users visit a website, important actions should feel simple and obvious. If visitors struggle to find buttons, forms, or key information, they’re more likely to leave before completing the desired action.
Businesses and designers can apply Fitts’s Law by making important CTAs visually clear, ensuring buttons are large enough to use comfortably on mobile, and placing key actions where users naturally expect to find them.
For example, if generating enquiries is a key website goal, a ‘Request a Quote’ or ‘Contact Us’ button should be easy to identify rather than hidden within the navigation.
2. Hick’s Law: Reduce unnecessary choices
Hick’s Law states that the time it takes someone to make a decision increases as the number of choices available increases.
Too many navigation choices, competing messages, or unclear next steps can create decision fatigue and prevent users from taking action.
A few simple ways businesses can apply Hick’s Law is to keep the navigation simple, prioritise the most important products or services, and reduce unnecessary steps in conversion journeys.
For example, a homepage should clearly communicate what a business does and where users should go next, rather than presenting visitors with too many competing options.
3. Jakob’s Law: Use familiar website patterns
Jakob’s Law suggests that users prefer websites to work in ways they’re already familiar with. Users transfer expectations they have developed from other websites and digital experiences.
A website should feel intuitive from the moment someone arrives. While creativity and originality are important, making a website too different can create unnecessary confusion.
With that in mind, you should consider familiar patterns such as placing logos in the top-left corner and linking back to the homepage, using recognisable navigation structures, and keeping important information in expected locations.
A website can still have a unique visual identity while still maintaining familiar behaviours that make it easier for users to navigate.
4. Law of Prägnanz: Keep information clear and simple
The Law of Prägnanz explains that people naturally interpret complex information in the simplest way possible.
This essentially means that visitors don’t want to spend time trying to understand how a website works. Clear layouts and simple messaging help users quickly understand what a business offers.
Businesses can apply this principle by removing unnecessary design elements, creating clear page structures, and using straightforward messaging.
A website should communicate value quickly rather than making users work to understand the information presented.
5. Law of Proximity: Group related information together
The Law of Proximity explains that people naturally perceive elements that are positioned close together as being related.
The way information is arranged on a website affects how easily users understand the relationships between different elements.
Grouping related services together, keeping headings close to supporting content, and structuring forms logically are all ways businesses can use proximity in their web design.
Good spacing and organisation help visitors understand information faster and create a smoother browsing experience.
6. Miller’s Law: Make information easier to process
Miller’s Law suggests that people have a limited capacity for processing information at one time.
Large amounts of information can quickly overwhelm website visitors, particularly when they’re trying to make decisions. That’s why businesses and designers should break content into manageable sections, use headings and visual hierarchy, and prioritise the most important information.
Essentially, instead of presenting users with large blocks of content, websites should guide visitors through information gradually.
7. Pareto Principle: Focus on what creates the biggest impact
The Pareto Principle suggests that a small number of actions often create a significant proportion of results.
Not every website improvement will have the same impact, which is why businesses should focus their efforts on the areas that matter most to users. This might include:
- Improving high-traffic pages
- Optimising important conversion points
- Prioritising key customer journeys
Understanding where users interact most with your website helps businesses make smarter design decisions.
8. Peak-End Rule: Create positive experiences at key moments
The Peak-End Rule suggests that people remember experiences based on their most significant moments and how those experiences finish.
A user’s overall perception of your website can be influenced by key interactions, such as completing an enquiry or purchasing a product.
Some ways businesses can create a positive experience include:
- Making forms simple to complete
- Providing helpful confirmation messages
- Creating clear next steps
It’s the small details that can have a significant impact on how customers remember their interaction with your brand.
9. Serial Position Effect: Prioritise important information
The Serial Position Effect suggests people are more likely to remember information placed at the beginning and end of an experience.
Website visitors may not remember every detail on a page, so important messages should be positioned strategically. Businesses and designers should consider including strong messaging on their homepage, clear introductions to services, and effective CTAs at the end of sections.
The most important information should appear where users are most likely to notice and remember it.
10. Von Restorff Effect: Make important elements stand out
The Von Restorff Effect suggests that elements that stand out are most likely to be remembered.
That’s why websites need to guide attention towards important actions without overwhelming users. Some ways businesses can do this is to use contrast, visual hierarchy, and strategic design emphasis.
For example, a clearly designed CTA button can help users recognise the next step they should take.
How do these UX rules shape the website design process?
User experience rules shouldn’t be considered as an afterthought. They can influence every stage of creating an effective website, including:
- Website strategy – UX principles help businesses understand what users need from the website, how visitors should navigate the site, and which actions are most important.
- Website design – during the design stage, UX rules influence page layouts, content hierarchy, navigation, and CTAs.
- Website development – during development, these principles help ensure the website performs effectively, features are intuitive, and user journeys remain consistent.
- Ongoing optimisation – after launch, businesses can continue improving UX through analytics, user feedback, conversion testing, and performance reviews.
Let us help you create a website designed around your customers
The most successful websites are built around understanding the people who use them. While design aesthetics are important, a website must also be intuitive, easy to navigate, and aligned with the goals of both the business and its customers.
By applying the above proven UX rules and website design laws, businesses can create digital experiences that improve engagement, build trust, and encourage users to take action.
At Fifteen, we combine robust strategy, proven UX design, and professional website development to create websites that are designed around real user behaviour. From improving customer journeys, to creating conversion-focused experiences, our expert team helps businesses build websites that deliver meaningful results.
Get in touch with us today to discuss how we can help you create a website that works for your customers and your business.