| Your question | The short answer | Where it comes from |
|---|---|---|
| What is a call to action? | The button or link that asks people to take the next step | Our definition |
| How do I write one? | A verb plus the result, a line of reassurance and at most one quiet second option | Google Ads Help; Nielsen Norman Group |
| Which words work? | Specific ones, such as “Get my quote” or “Book a call”, not “Submit” or “Learn more” | Nielsen Norman Group; W3C |
| How big should the button be? | At least 24 by 24 CSS pixels; 44 by 44 points is Apple's default on iPhone | W3C WCAG 2.2; Apple |
| How many per page? | One main action per part of the page | Our own rule since 10 October 2026 |
| How do I measure it? | Clicks in GA4, then the enquiries they lead to | Google Analytics Help |
What is a call to action (CTA)?
A call to action, or CTA, is the button or link that asks someone to take the next step: get a quote, book a call, send a message. In marketing it is the point where interest turns into an action. It sits on pages, in ads, in emails and at the end of a form. A good one tells people both what to do and what they get, so clicking feels like a small, safe step rather than a leap.
Google's advice for ads puts it well: “A strong, clear call-to-action tells customers what they can expect and nudges them toward your desired action.” It adds that the more closely the call to action matches the keywords and the landing page, “the better your chances of a conversion.”
How do you write a call to action? A four-part formula
Build it from four parts, and keep only the ones the moment needs:
- A verb: what they do. Get, Book, See, Check, Message, Download.
- The result: what they get. My quote, a 15-minute call, prices for my area.
- Reassurance: one short line under the button that removes the worry, such as when you'll reply or that there is no charge.
- One quiet second option: a text link for people who aren't ready, such as WhatsApp or a phone number, never a second big button.
Fill in each line for one page, then read the button aloud: it should make sense with nothing around it.
| Part | Ask yourself | Your words |
|---|---|---|
| Verb | What exactly will they do? | Not supplied |
| Result | What do they get the moment they click? | Not supplied |
| Reassurance | What would stop them clicking, and what answers it? | Not supplied |
| Second option | What can someone do who isn't ready for the main step? | Not supplied |
The reason specificity matters is clarity, not magic. Nielsen Norman Group found that the phrase “Learn More” “creates uncertainty, because users don't know what to expect”, and advises: “avoid a generic call-to-action and increase the information scent by stating precisely what users should expect.” Those are findings about clarity from usability studies, not a promised lift in clicks.
Which CTA words work best?
The words that say what happens next. Six common rewrites, as examples:
| Goal | Example labels | Avoid |
|---|---|---|
| A price | Get my quote · See prices for your area | Submit · Contact |
| A call or visit | Book a 15-minute call · Choose a time | Get started |
| A message | Message us on WhatsApp · Ask a question | Send |
| A check | Check availability for your date · Check if we cover your area | Learn more |
| A resource | Download the checklist · Get the price guide | Click here |
Google's own word list for ads is a good starting point: “Buy, Sell, Order, Browse, Find, Sign up, Try, Get a Quote.” And accessibility rules point the same way: WCAG 2.2 asks that the purpose of each link can be determined “from the link text alone or from the link text together with its programmatically determined link context”, which rules out a bare “Click here”.
Call to action phrases you can use
| Goal | Phrases |
|---|---|
| A price | Get my quote · See prices for your area · Check today's price · Get a fixed price · Compare our plans · See what it costs |
| A call or visit | Book a 15-minute call · Choose a time · Book a free consultation · Talk to a specialist · Reserve your slot · Request a visit |
| A message | Message us on WhatsApp · Ask a question · Send us your details · Chat with our team · Get a reply today · Tell us what you need |
| A check | Check availability for your date · Check if we cover your area · See if you qualify · Check your eligibility · Find your nearest branch · See what's included |
| A resource | Download the checklist · Get the price guide · See a real example · Read the case study · Get the free audit · Try the calculator |
Use them as starting points, not slogans: change the nouns to your service, and only promise what the next step really gives. “Get a reply today” is only honest if someone replies today.
How should a CTA button look?
Big enough to tap, easy to see and obviously the main thing to do. Good call to action button design comes down to five things, and the accessibility standards give real numbers for the first three:
- Size: WCAG 2.2 sets a minimum target of “at least 24 by 24 CSS pixels” (success criterion 2.5.8, Level AA). Apple's default control size on iPhone and iPad is 44 by 44 points. On our own site, menu, footer and breadcrumb links and the phone controls are built at least 44 pixels tall.
- Spacing: Apple suggests “about 12 points of padding around elements that include a bezel”, so people don't tap the wrong control.
- Contrast: the label needs a contrast ratio of at least 4.5:1 against the button (1.4.3), and the button needs at least 3:1 against the page around it (1.4.11).
- Hierarchy: one filled button per part of the page, with any second option as a quiet text link. Since 10 October 2026 that has been our own rule, and an automated test fails if a booking button is added to our homepage hero, header or phone dock.
- Placement: next to the offer and the proof, again at the end of the page, and within reach on a phone. Google's advice is to put important information towards the top of the page.
What the standards don't set is a color. A button stands out because of contrast with its surroundings, so the right color is the one that is clearly different from everything else on your page.
What goes in a call to action section?
A call to action section is the closing block that gathers the page into one decision. It needs four things, in this order:
- A headline that restates the outcome, not “Get in touch”.
- One sentence that answers the last worry: price, time, effort or what happens next.
- The main button, with its reassurance line underneath.
- One quiet second option for people who would rather message or call.
Our own homepage hero follows the same pattern with exactly two actions: “Contact us” and “Get a free audit”. Our promise to anyone who sends an enquiry is a reply within one business day, and that kind of line is what belongs under a button.
How do you write CTAs for ads?
Make the ad's call to action and the page's call to action the same promise. Google says: “Your landing page should also mirror the call-to-action in your ad text.” It also suggests running 3 to 5 ads in each ad group and trying different headlines or calls to action between them.
On Facebook and Instagram you choose a button from a fixed list, and the choices depend on your campaign objective and where people go next. For lead ads with an instant form, Meta's list includes Apply now, Book now, Get quote, Sign up and Learn more, but not Contact us. Meta's Instagram ads API uses “Learn more” when no button is set, which is exactly the label Nielsen Norman Group warns about, so pick the specific one that matches the form. Our guide to what makes a good landing page covers the page side of the match.
How do you measure CTA clicks?
Count the clicks, then judge them by the enquiries they lead to. In Google Analytics 4, enhanced measurement records a click event when someone follows a link “that leads away from the current domain”, which covers WhatsApp links and booking tools hosted elsewhere, and records form_start and form_submit for forms. A button that stays on your site isn't on that list, so add your own event for it. Our guide to conversion tracking covers the full setup.
- Mark the actions that matter, such as the form send and the WhatsApp click, as key events.
- Compare clicks with enquiries: a button that gets clicks but no enquiries points at what comes after it, usually the form or the page it opens.
- Change one label at a time, and give each version long enough to collect real enquiries before you decide.
The other checks for a page that gets visits but few enquiries are in our guide to website traffic but no leads, and the form behind the button is covered in the lead generation funnel guide.
Call to action myths, and the facts
| Myth | Fact |
|---|---|
| One button color converts best. | The standards set contrast, not color: 3:1 for the button against the page and 4.5:1 for its text. Use a color that stands out on your page. |
| More buttons mean more clicks. | Competing buttons split attention. Give each part of the page one main action and at most one quiet second option. |
| “Click here” is fine. | WCAG 2.2 asks that a link's purpose be clear from its text and context, and “Click here” says nothing. |
| “Learn more” is a safe default. | Nielsen Norman Group found it “creates uncertainty, because users don't know what to expect”. |
| A CTA is only a button. | Link text, a phone number and a WhatsApp link are calls to action too, and need the same clarity. |
Questions people ask about calls to action
What is a call to action?
A call to action is the button or link that asks someone to take the next step, such as getting a quote, booking a call or sending a message. A good one says both what to do and what the person gets.
What does CTA stand for?
CTA stands for call to action. In marketing it means the prompt, usually a button or a link, that asks people to take a specific next step on a page, in an ad or in an email.
What are good CTA words?
Specific verbs followed by the result, such as Get my quote, Book a 15-minute call, See prices for your area or Message us on WhatsApp. Avoid labels that hide what happens next, such as Submit, Click here or Learn more.
How do you design a CTA button?
Make it at least 24 by 24 CSS pixels, the WCAG 2.2 minimum, and ideally around 44 points tall on phones, with text at 4.5:1 contrast and the button at 3:1 against the page. Give each part of the page one filled button, with space around it.
What is a call to action section?
It is the block, usually at the end of a page, that brings everything into one decision: a headline that restates the outcome, one line that answers the last worry, the main button and one quiet second option.
What are call to action best practices?
Say what happens next, match the ad and the page, keep one main action per part of the page, make the button easy to see and tap, and measure clicks against the enquiries they lead to, changing one thing at a time.
| Question | Short answer |
|---|---|
| What is a call to action? | The button or link for the next step |
| What does CTA stand for? | Call to action |
| Good CTA words? | A verb plus the result: Get my quote |
| How to design a CTA button? | Big, high contrast, one per section |
| What is a CTA section? | The closing block: one decision |
| Best practices? | Specific, matched, measured |
Start with the page that gets the most visits and the fewest enquiries, and rewrite its main button with the formula above. If you'd rather we review the whole path, see conversion optimization, or our Google Ads and Meta Ads work for the ads that lead there.
About this article
Guidance is quoted from Google Ads Help, Google Analytics Help, Meta's Business Help Center and developer documentation, W3C's WCAG 2.2 and Apple's Human Interface Guidelines, read on 20 October 2026, and from Nielsen Norman Group's published studies. The labels are examples. The rules on our own site are described as they stand on 20 October 2026, and we claim no click or conversion results from them.