Designing for Conversion: UX Principles That Drive Results

A website can win design awards and still bring in no enquiries. The opposite happens too: plain sites that quietly produce leads every week. The difference is rarely how good the site looks. It's whether the right visitor can work out, quickly, what you offer and what to do next.

That's what conversion-focused design is about. Below are the UX principles we apply on every web project, and what each one looks like in practice.

First, decide what a conversion is

Before changing anything, name the action each page exists to produce. For most service businesses it's an enquiry or a booked call. For a shop it's a purchase. For a SaaS product it might be a trial signup.

Give each important page one primary action. Supporting actions (reading a case study, joining a newsletter) are fine, but they shouldn't compete for the same space. And set up tracking for that action before you redesign, so you have a baseline. Without one, "the new site is doing better" is just a feeling.

1. Make the first screen answer three questions

Within a few seconds, a visitor should know what this is, whether it's for them, and what to do next. That means:

• A headline that names the outcome or the audience, not just the company. "Websites and branding for clinics opening a second location" tells someone far more than "Creative solutions for your business".
• A short supporting line that adds one specific detail.
• One clear primary button.

If your first screen is a slideshow of stock images with a vague slogan, this is the highest-value fix on the site.

2. Reduce the number of choices

Every extra option on a page is another decision, and more decisions slow people down. Landing pages for ads or campaigns often convert better with the main navigation removed, because there's nowhere to wander off to. On the main site, keep one primary call to action per section and one secondary option at most.

3. Only ask for what you'll actually use

Each form field is a small cost to the visitor. If you won't use a field to qualify or reply to a lead, remove it. Name, email and a message box are enough for most enquiry forms; you can ask the rest on the first call.

A few details make a real difference:

• Keep labels visible above fields. Placeholder text disappears as soon as someone starts typing.
• Write error messages that say how to fix the problem, next to the field that has it.
• Tell people what happens after they submit, for example "We reply within one working day."

4. Put proof next to the ask

People hesitate right at the moment they're asked to commit. That's where the evidence should be. A short testimonial, a relevant case study or a concrete result placed beside the form or button does more than the same content on a separate page nobody visits.

Specific proof beats general praise. "They rebuilt our booking flow and no-shows dropped" is more convincing than "Great team, highly recommend."

5. Treat page speed as part of the design

A slow page loses people before they've read a word. Google's Core Web Vitals are a sensible yardstick: aim for Largest Contentful Paint under 2.5 seconds, Interaction to Next Paint under 200 milliseconds, and Cumulative Layout Shift under 0.1.

Most speed problems on marketing sites come from the same few places:

• Oversized images. Serve modern formats like WebP or AVIF at the size they're displayed.
• Images and embeds with no reserved space, which make the page jump as they load.
• Too many third-party scripts: chat widgets, trackers and plugins that each add weight.
• Heavy hero videos with no lightweight poster image.

6. Design for thumbs first

For a lot of businesses, most visits now come from phones, and the mobile layout is where conversions are won or lost. Make tap targets big enough to hit comfortably (around 44 to 48 pixels), make phone numbers tappable, keep the main button within easy reach, and check forms on a real phone rather than a resized browser window.

7. Write buttons that say what happens

"Submit" and "Learn more" tell the visitor nothing. "Get a quote within 24 hours", "See pricing" or "Book a 20-minute call" set an expectation, and a clear expectation lowers the risk of clicking. The button label is some of the most-read copy on the page, so give it the same care as the headline.

8. Find the friction you didn't know about

Analytics tell you where people leave. Session recordings and heatmaps show you why. Watch twenty or thirty real sessions and you'll usually spot patterns quickly:

• People clicking on things that aren't links.
• Important content hidden in tabs, accordions or carousels nobody opens.
• A pop-up or cookie banner covering the main button on mobile.
• Visitors scrolling up and down looking for a price or a contact detail.

Test changes instead of guessing

A/B testing works well when you have enough traffic to reach a clear result. Many smaller sites don't, and that's fine. Make one meaningful change at a time, compare against your baseline over a sensible period, and back it up with quick usability tests. Watching even five people try to complete a task on your site will surface most of the obvious problems.

Quick conversion checklist

• Each key page has one primary action, and it's tracked.
• The first screen says what you do, who it's for, and what to do next.
• Forms ask only for what you need, with visible labels.
• Proof sits beside every important call to action.
• Core Web Vitals are in the "good" range on mobile.
• Buttons describe what happens when you click them.
• You've watched real sessions in the last three months.

How we approach it

Our web design and development work starts from the action the site needs to produce and works back to layout, copy and build. We design mobile-first, set up on-page SEO and analytics at launch, and keep measuring after go-live rather than handing over and walking away. Our UI/UX work for DEEP is a good example of the process.

If you want a second opinion on your current site, get in touch and tell us what it should be doing that it isn't.

Frequently asked questions

What is a good website conversion rate?

It depends heavily on the industry, the offer, the price point and where the traffic comes from, so published averages aren't much use as a target. Compare your site with its own past performance, and look at conversion by traffic source. A page that converts poorly from social but well from search has a different problem from one that converts poorly everywhere.

Is a redesign the only way to improve conversions?

No. Many sites improve noticeably from targeted fixes: a clearer headline, a shorter form, faster images, better placed proof. A full redesign makes sense when the structure itself is the problem, or the site no longer reflects the business.

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ADNAP builds brands end to end — branding, web design & development, 2D and 3D animation, and AI video generation. See all services or browse recent work.