A landing page for an ad campaign has one job: to turn a click you have already paid for into a lead, whether that means a phone call, a form submission or a purchase. Every visitor from an ad carries a cost, so a page that fails to convince is ad spend wasted, however good the ad itself is.
This article covers the six things that most influence how well a landing page converts for an ad campaign, with a way to check each one yourself and a way to measure the results. You don't need a technical background to use it.
At a glance: six things to check
| What to check | Question it should answer | Quick check |
|---|---|---|
| One goal, one call to action | What is the one thing you want the visitor to do? | Count how many different buttons or links invite visitors to go somewhere else |
| A headline that matches the ad | Does the visitor instantly feel "yes, this is what I was looking for"? | Put your ad and the page side by side and compare the key words |
| Benefit-focused copy | What's in it for me? | Cross out any sentence that makes a claim without a reason or proof |
| Design that guides | Where should the eye go after reading? | Squint at the page: the main button should still stand out most |
| Fast and comfortable on a phone | Does the page appear right away, and is it easy to tap? | Run PageSpeed Insights, then try the page yourself on a phone with one thumb |
| Measured and tested | What share of visitors actually get in touch? | Make sure a click on the main button is recorded as a conversion in your analytics tool |
1. One goal, one call to action
An effective landing page has a single conversion goal: filling in a form, sending a WhatsApp message, making a call or buying something. Too many choices make visitors hesitate, and a hesitant visitor usually closes the page.
The test is simple. Look at your page and count every button and link that takes the visitor somewhere else, including the navigation menu, footer links and banners. For a page built specifically for ads, consider simplifying or removing the main menu so attention stays on one action. The call-to-action button can appear several times on a long page, but every instance should lead to the same action.
Choose an action that fits your audience's habits too. In many markets, Indonesia included, a button that opens a WhatsApp chat feels lighter than a long form; we cover this approach in our WhatsApp Business marketing strategy guide.
2. A headline that matches the promise of the ad
People arriving from an ad already have an expectation, set by the line they clicked. If the ad promises "construction website design" but the page opens with "Welcome to our company", they have to work out whether they are in the right place. Some will simply leave.
Use the same words as the ad, at the very top of the page, and make the headline answer "what's in it for me?" within the first few seconds.
Try the 5-second test, which we also use to check company profile websites (see 5 signs of a company profile website that builds business credibility). Show the page to someone who doesn't know your business for 5 seconds, then ask: "What is this page offering, and what am I being asked to do?" If the answer is off, the headline needs rewriting.
3. Copy that focuses on benefits
A list of features answers "what do you have?" Visitors want to know "what changes for me?" Write from their side, in the language they use every day, and avoid generic claims that could be pasted onto any business.
| Feature version (weaker) | Benefit version (stronger) |
|---|---|
| We provide a full-service solution | One team handles everything from the site survey to completion, so you don't have to coordinate several parties |
| Our team is experienced | See the projects we have completed, with the scope of work for each |
| Contact us for more information | Send a message now and we'll reply with an estimate and the next steps |
These examples only illustrate how to rewrite copy; they are not claims about any particular client. The point is that every sentence should survive the question "so why does that matter to the visitor?"
Pair each benefit with proof someone can check: the project name, what was done and, where possible, a link to the result. Don't invent testimonials or result figures you can't back up. One doubtful claim can undermine trust in the whole page.
4. Design that supports rather than distracts
A landing page's design should guide the eye, not show off. A clear hierarchy lets visitors read in the order you intend: headline, main benefit, proof, then the call-to-action button.
- Button contrast: the call-to-action button should be the most prominent element on screen, with text that is easy to read against the button's colour.
- White space: leave room between sections. A crowded page leaves visitors unsure where to look.
- Short forms: ask only for what you genuinely need to follow up, such as a name, a way to contact them and what they need. Every extra field is a new reason to stop.
- Relevant visuals: images or illustrations should help explain the offer. Decoration that doesn't help only pulls attention away.
5. Fast loading and comfortable on a phone
Many ad clicks come from phones, often on an ordinary connection. A slow page loses visitors before they have read a word, which means a wasted paid click.
One common measure is Largest Contentful Paint (LCP), which is how quickly the main content of the page appears. Google recommends an LCP of 2.5 seconds or less; see the explanation of LCP on web.dev. You can measure it for free with PageSpeed Insights: paste in the page address and look at the Mobile tab. The usual causes of slow pages are simple: oversized images, too many animations or sliders, and scripts that aren't needed.
Once it is fast, try the page yourself on a phone with one thumb. When we checked our own pages on a narrow screen, we found several text links only about 19 pixels tall, too small to tap comfortably, and we enlarged their tap areas. This kind of problem doesn't show up on a laptop. If you need a page built specifically for ads and optimised for mobile from the start, see our landing page service.
6. Measure first, then test and optimise
Without measurement, "this landing page is good" is just a feeling. Decide what counts as a conversion, for example a click on the WhatsApp button or a form submission, and make sure it is recorded. On Codwa's own site, we marked the contact and generate_lead events as key events in Google Analytics 4, and set up an internal traffic rule so our own team's visits can be separated from the data.
The conversion rate is the number of conversions divided by the number of visits. It only becomes useful when you compare it over time for the same page.
On A/B testing: comparing two versions only means something when the page gets enough visits. With little traffic, a result based on a handful of conversions is easy to misread. A safer approach is to change one thing at a time (the headline, the button text or the length of the form), let each version run for an equal period, and compare before changing anything else.
Where to start if your landing page doesn't meet all six yet
The right approach depends on your situation. There are usually three:
| Where you are now | A sensible next step |
|---|---|
| You have a landing page, but few visitors get in touch | Go through the six points above one by one, fix the weakest, and make sure conversions are measured before you change anything |
| Your ads send people to the homepage of an ordinary website | Build a dedicated page whose headline and call to action match the ad |
| You don't have tidy offer material and proof yet | Write down the offer, work examples and answers to common questions first, then design |
If you're still unsure whether you need a landing page or a company profile website, read landing page vs company profile website. To check whether your business website is ready to generate leads, see signs your business website is ready to generate leads.
Frequently asked questions
How long should a landing page be?
There is no fixed number. A simple, low-cost offer can work with a short page, while a high-value service usually needs more explanation, proof and answers to objections. The measure is whether a visitor has enough reason to act by the end of the page.
Do I need A/B testing from the start?
No. Start with the six basics above and make sure conversions are measured. A/B testing only becomes useful once the page has enough visits to compare fairly.
Next step
Open your ad and your landing page side by side and check three things: does the headline match the promise of the ad, is there only one main call to action, and is the page comfortable on a phone? Those three checks usually show which area needs attention first.
Talk to Codwa Studio about a landing page for your ad campaign
Reviewed by Riki Siahaan. Last updated: October 6, 2026.
