Most corporate websites are designed to look good in a presentation, not to convert visits into clients. The design brief says "we want a modern, clean and professional website". The conversion brief says "we want the highest possible percentage of visitors to contact us or buy". These are different objectives, and sometimes incompatible ones.
- 1. The hero headline
- 2. The main CTA: one, visible and specific
- 3. Page load speed
- 4. Social proof in the right place
- 5. The form: fewer fields, more conversion
- 6. Mobile-first design
- 7. The services page: specific, not generic
- 8. Chat at the right moment
- 9. A visible differentiating value proposition
- 10. Tracking user behaviour
These are the ten elements with the greatest impact on conversion rate, backed by data from real A/B tests.
1. The hero headline
The main headline is the element with the greatest impact on the bounce rate. If within the first three seconds the visitor does not understand what the company does and what it can do for them, they leave. The most common mistake: headlines that describe what the company is ("We are a digital marketing agency") instead of what it achieves for the client ("More clients from Google, without relying on paid advertising").
A/B tests consistently show that headlines focused on the client’s outcome convert between 20% and 40% better than headlines focused on describing the company.
2. The main CTA: one, visible and specific
Most websites have too many CTAs competing with each other. The visitor does not know which action is the priority. High-converting websites have one clearly dominant primary CTA, with secondary ones visually subordinate.
The CTA text matters more than it looks. "Contact" converts less than "Get a free quote", which converts less than "See how it works in 2 minutes". Specificity and low perceived risk are the factors that increase CTA click-through rate the most.
3. Page load speed
Each additional second of load time reduces the conversion rate by between 7% and 20% depending on the sector. On mobile, the impact is greater. A website that loads in 1,5 seconds converts significantly better than the same website loading in 3,5 seconds, with the same content and design.
Page load speed is the only conversion factor that is also an SEO ranking factor. Investing in speed optimisation has a double return: more traffic and better conversion of that traffic.
4. Social proof in the right place
Testimonials and reviews increase conversion, but only when they are in the right place in the user journey. A testimonial on the home page about service quality has less impact than the same testimonial on the pricing page, where the visitor is weighing up whether the investment is worth it.
Types of social proof in order of effectiveness: case studies with concrete figures, video testimonials, written testimonials with verifiable name and company, number of clients or projects, logos of recognisable clients.
5. The form: fewer fields, more conversion
Each additional field in a form reduces the conversion rate. The optimal contact form has the minimum fields needed to give a useful response to the user. For most service businesses, that means name, email and a description of the problem or need.
A/B tests on forms are consistent: going from six fields to three fields increases the conversion rate by between 40% and 120%. The phone number as a mandatory field reduces conversion by between 5% and 10% compared with making it optional.
6. Mobile-first design
More than 60% of web traffic in Spain comes from mobile devices. A website designed first for desktop and adapted afterwards for mobile tends to have usability issues on mobile that directly impact conversion. Small CTAs, text too small to read without zooming in, and forms that are difficult to fill in on a touchscreen are the most common problems.
7. The services page: specific, not generic
The generic services page that lists everything the company does, with no depth on any specific service, has low conversion. Visitors who arrive looking for a specific service need to see that the company genuinely understands that service: the process, the typical results, the success stories for that particular service.
A dedicated page per service with specific content converts better than a single page listing all services superficially, and it also ranks better in SEO.
8. The chat at the right moment
A chat that appears immediately on entering the website is perceived as intrusive. A chat that appears after 30-60 seconds, when the visitor has had time to read something, or on specific high-intent pages (pricing, contact), increases the conversion rate by between 15% and 30%.
9. The visible differential value proposition
The value proposition is not a list of services or company values. It is the answer to the question "why choose you instead of the competition?". On most websites, that answer does not appear at all, or appears in such generic terms that it adds nothing.
The value proposition must be visible on the first screen, without scrolling, and must be specific: not "we are the best" but "we are the only marketing agency in Bilbao that charges only if we deliver results".
10. Tracking user behaviour
Without behavioural data, conversion optimisation is speculation. Tools such as Hotjar or Microsoft Clarity (free) show heat maps, session recordings and conversion funnels that reveal exactly where users drop off and why.
The correct process: install the behaviour tool, observe for two to four weeks, identify the point of greatest drop-off, formulate an improvement hypothesis, run the A/B test and measure. Repeat indefinitely.