You have a website, people visit it, and the phone stays silent. Traffic from ads and Google costs money, so every closed tab is money spent. A website that sells differs from a plain online brochure in a handful of specific elements. You can check most in fifteen minutes and fix them without a rebuild.
Below are the 12 elements that, in our experience, most often decide whether a visitor enquires. For each, we show how to check it and the most common mistake. A checklist table follows at the end.
The first seconds: a promise and proof
1. A headline with a promise
The headline must answer three questions: what you do, for whom and what result the customer gets. “Welcome to our website” or “Professional services since 2005” answers none of them.
A good promise is specific and verifiable. Compare “Renovation services” with “Bathroom renovation in 14 working days, with the deadline written into the contract”. The second filters out the wrong people at once and keeps the right ones reading.
Add one supporting sentence and a button below it. Test it: show the page to a friend for 5 seconds and ask what you do. If they can’t say, rework the headline.
2. Proof: reviews, case studies, numbers
People trust other customers more than companies. A review with a name, town and photo (with the author’s consent) works better than an anonymous “Recommended”. The strongest reviews describe a specific problem and how you solved it.
The second kind of proof is past work. Show before and after photos, screenshots and a short note: the task, what you did, the result. Two or three examples suffice on a service page, with the full list elsewhere, as in our website and system projects.
Proof can also be:
- a Google review embedded next to the offer,
- client logos, with permission,
- numbers: years in business, jobs completed, events run or patients treated,
- certificates, awards and membership of industry bodies.
Place proof near where you ask for a decision. A review just above the form beats the same review hidden in the footer.
Contact in one move: CTA, form and phone
3. A clear CTA
A CTA (call to action) is a button or link telling the visitor what to do next. Pick one main action per page and repeat it every few screens. Five different buttons side by side distract and delay the decision.
Button text should name the next step or benefit: “Check available dates”, “Get a renovation quote”, “Book a free consultation”. Labels like “Send” and “Click here” promise nothing. Give it a contrasting colour used nowhere else, so the eye finds it at once.
On phones, a bar fixed to the bottom of the screen with “Call” and “Message” buttons works well. A campaign landing page can have a single action and a hidden menu, so nothing distracts from the offer.
4. A short form
Every form field is another reason to give up. For first contact, a name, phone or email and a short message usually suffice. Sort out the rest on the call.
One unnecessary field can cost more than you think. Expedia removed the optional “Company name” field from its booking form. Some customers typed their bank’s name there, then the bank’s address, so card verification failed. According to Joe Megibow, Expedia’s vice president of analytics, that single change was worth $12 million a year in profit (source: The Mary Sue, citing Silicon.com).
If a quote needs more details, split the form into 2–3 steps. Start with easy questions and ask for contact details last. After submission, say when and how you will reply.
5. A tappable phone number
Many people prefer calling to writing, especially for local and urgent services. Make the header number a tel: link, which opens the dialler on a smartphone. A number shown as an image or plain text must be retyped, and some people won’t bother.
Show your answering hours next to it. If you can’t always pick up, offer an alternative: WhatsApp, a “we’ll call you back” form or a chat on the site.
Speed and the mobile version
6. Loading speed
A slow site loses people before they see the offer. In a 2016 study, Google reported that 53% of mobile visitors leave a page that takes longer than 3 seconds to load (source: Marketing Dive). The data is old, and users have hardly grown more patient.
We watch this on our own site too. In October 2026 we cut the number of server requests on efektywnymarketing.pl from 138 to about 45 and the page weight from 2.8 MB to about 0.9 MB. The mobile PageSpeed score rose from 69 to 79, and First Contentful Paint (FCP) fell from 3.8 s to 2.2 s.
On WordPress sites, check these common causes of slowdowns first:
- full-resolution photos straight from the camera instead of compressed WebP or AVIF files,
- plugins that load their scripts on every page,
- several typefaces in many weights,
- third-party scripts (chats, maps, videos) loading immediately instead of when needed.
Test your site in the free PageSpeed Insights tool, focusing on the mobile score, which is usually lower than desktop.
7. A mobile version designed from the start
According to StatCounter, about 43% of page views in Poland in September 2026 came from phones (source: StatCounter). For Facebook and Instagram traffic the share is usually much higher, as people use those apps mostly on smartphones.
Design the mobile version separately, from the first sketch. Check on your phone:
- can you read the text without zooming,
- are buttons easy to hit with a thumb,
- does the form fit without sideways scrolling,
- does a pop-up cover the content,
- are the promise and CTA visible on the first screen.
Fun fact. In December 2007 Barack Obama’s campaign team tested 4 buttons and 6 photos or videos on its sign-up page, 24 combinations. The winner was a “Learn More” button paired with a family photo. The sign-up rate for the mailing list rose from 8.26% to 11.6%, an increase of 40.6%. The team estimated that the test brought in about 2.9 million extra email addresses and about $60 million in additional donations (source: Optimizely).
An offer that answers questions before the call
8. An offer with a “from” price
With no price on the site, some people leave to check competitors and never return. A “from” price or a range sets expectations and filters out customers outside your budget, so you talk to people who know what they are signing up for.
Explain what the final amount depends on: floor area, number of people, date, scope. Customers then see where the quote comes from and trust it more.
A calculator works even better. In the booking system we built for DMD Arena Częstochowa, a sports and events venue, customers pick a date, arrange the hall on an interactive floor plan, choose equipment and catering, and see the price live. An enquiry holds the date for 72 hours, and staff see each booking’s status in a panel. We build solutions like this as custom applications and booking systems.
9. Answers to objections and an FAQ
Every customer has a few “buts” in mind: too expensive, too slow, what if it goes wrong, can you make my date. If your site doesn’t answer them, customers will, usually against you.
Collect the questions you hear by phone and email and answer them briefly on the service page. For example:
- “How long will it take?” Give a typical turnaround and what it depends on.
- “What if I’m not happy?” Describe your guarantee, revisions or refund policy.
- “Do you work in my area?” List the towns or the area you cover.
- “What does working with you look like?” Show 3–4 steps from enquiry to delivery.
An FAQ helps SEO too. Questions phrased the way people type them into Google attract longer, more specific searches.
10. Trust: GDPR and company details
Before leaving a phone number, people want to know who they are dealing with. Full company details in the footer and on the contact page are basic. For companies it is a legal duty: in Poland, art. 206 of the Commercial Companies Code requires the website of a limited liability company (sp. z o.o.) to state, among other things, its registered name, seat and address, the registry court and National Court Register (KRS) number, its tax ID (NIP) and its share capital (source: Lege Artis).
By the form, state briefly who processes the data and why, linking to the privacy policy. Use an SSL certificate and a cookie banner where refusing consent is as easy as giving it. Small details build credibility too:
- real photos of your team and workplace instead of stock images,
- your address on a map, if customers visit you,
- recent blog posts (if the latest article is several years old, people may assume the company has closed),
- details that match your Google Business Profile.
AI assistant and analytics: a website that sells and measures
11. A 24/7 AI assistant
Some customers browse in the evening and at weekends, when nobody answers the phone. An AI assistant can then answer questions about your offer, prices, dates and directions, collect contact details and pass you the enquiry with a conversation summary.
A good assistant uses your site content and a knowledge base, and hands over to a person when it doesn’t know the answer. AI assistants run on sites such as the Smile Design dental clinic and the Kotelnica Summer Festival. Read how we set up an AI virtual assistant on your website.
Start by listing the 20–30 questions customers ask most. That is ready material for the knowledge base and your FAQ.
12. Pixel and analytics
Without measurement you can’t tell what works. The minimum is Google Analytics 4 with events set up: form submissions, clicks on your phone number and email address, and chats started. A conversion on a website is exactly that kind of event. Visit numbers alone tell you very little.
If you run ads, install the Meta pixel and the Google Ads tag, ideally with server-side event tracking as well (Conversions API). Ad platforms learn from conversion data, so better data helps them find the right people. We base our sales-focused Meta and Google campaigns on data like this.
Monthly, check three numbers: service page visitors, how many took action and where they came from. Then you know whether to fix the site or the ad. Heatmaps, e.g. from the free Microsoft Clarity, show where people stop scrolling.
Checklist: a website that sells in 12 points
Go through the table with your phone in hand. Every failed point is a specific task.
| Element | How to check | Common mistake |
|---|---|---|
| 1. Headline with a promise | 5-second test on someone outside the company | A slogan about the company instead of the customer’s benefit |
| 2. Proof | Is there a review close to the form | Reviews only on a separate page |
| 3. CTA | Count the different actions on the first screen | A “Send” button in the background colour |
| 4. Form | Count the fields and ask which are needed | Fields you won’t use in the first conversation |
| 5. Phone | Tap the number on a smartphone | Number as an image or plain text |
| 6. Speed | PageSpeed Insights, mobile score | Heavy photos and unnecessary plugins |
| 7. Mobile version | Go all the way to an enquiry on a phone | A pop-up covering the content |
| 8. “From” price | Can a customer find a rough amount | “Price on request” for every service |
| 9. FAQ and objections | Compare with questions from emails | Generic questions nobody asks |
| 10. Trust | Footer, privacy policy, SSL | No tax ID or address |
| 11. AI assistant | Ask 5 questions in the evening | A chat nobody replies to |
| 12. Analytics | Send a test form and check the event in GA4 | Only page views are tracked |
Frequently asked questions
How does an effective website differ from an online brochure?
A brochure site says the company exists. An effective website leads visitors to an action: a call, enquiry, booking or purchase. The headline promise, proof, a clear CTA and measurement of that action make this happen.
Do I need a separate sales landing page?
For ad campaigns, usually yes. A sales landing page describes one service for one audience and has one action. Ad traffic sent to the home page must find the offer itself, and some people give up.
How much does a website that sells cost?
It depends on scope: pages, integrations (bookings, payments, an AI assistant) and whether copy and photos must be created from scratch. On the Polish market, a simple service website on WordPress usually costs from several thousand to around fifteen thousand złoty (roughly €1,000–3,500), and sites with booking or payment systems cost more. More in our article How much does a website cost.
How soon will I see the effect of the changes?
CTA, form or phone fixes work from launch, provided the site gets traffic. To judge a change, compare conversions before and after, ideally at a similar ad budget. Results in Google, for example from a new FAQ section, usually show up after a few weeks or months.
Can I improve my current site instead of building a new one?
Often, yes. On a healthy WordPress install, new headlines, CTAs, a form and analytics don’t need a new design. Rebuild when the site is slow due to an outdated template, works badly on phones or can’t take bookings or payments.
Where to start
You don’t need all 12 elements at once. Start with the cheapest: a tappable phone number, one clear CTA, a shorter form and conversion tracking. Then work on speed, an offer with a “from” price and an FAQ. An AI assistant and price calculators are the next step, once the basics are working.
Want us to review your site against this list, or design a new one? Get in touch. Since 2011 we have been building WordPress websites whose job is to turn visitors into customers. See how web design at Efektywny Marketing works, or call us on +48 794 505 965.
