A call-to-action button works when it is easy to find, clearly tells the visitor what happens when they click, and appears at the moment they are ready to act. In practice that means specific wording, a button on the first screen, repeats further down the page, and a colour that stands out from everything around it. Most weak CTAs fail on wording, not design.
What a call to action is
A call to action is the element that asks the visitor to take the page's main step: book, buy, sign up, download or get in touch. On a landing page it is usually a button, though it can be a form, a phone number or a booking calendar.
Every landing page should have one primary CTA. You can repeat it several times, but it should always ask for the same thing. If you also want a lower-commitment option (such as "See pricing" next to "Start free trial"), make it visually secondary so the main action stays obvious.
Wording: say what happens next
The single most useful rule for CTA copy is to describe the outcome of the click, not the mechanics of it.
- "Submit" describes what the visitor does. "Get my free quote" describes what they get.
- "Click here" describes a gesture. "Download the pricing guide" describes a result.
- "Learn more" is vague about where it leads. "See how it works" or "Watch the 2-minute demo" sets an expectation.
Specific wording reduces uncertainty. A visitor hesitating over a button is usually asking "what am I committing to?" The button text is the best place to answer.
Be specific about commitment
If the step is small, say so. "Book a 15-minute call" asks for less than "Book a consultation", even if the meeting is the same length, because the visitor knows what to expect. Likewise, "Start free trial" is clearer than "Get started" when the next step really is a trial.
First person versus second person
You will see advice to write buttons in the first person ("Start my free trial") rather than the second person ("Start your free trial"). The reasoning is sound: first-person wording lets the visitor read the button as their own decision. But results vary by audience and context, and the difference between "my" and "your" is small compared with the difference between a vague button and a specific one.
A sensible approach:
- Get the verb and outcome right first. That is where most of the gain is.
- Use first person when the button completes a sentence the visitor might say ("Yes, send me the checklist").
- Use second person or neutral wording when first person sounds awkward ("Book my appointment" is fine; "Call my plumber" is not).
- If you have enough traffic, test it. If you do not, pick the version that reads more naturally.
Keep it short, but not at the cost of meaning
Two to five words is typical. If you need more to be clear, put the extra detail in microcopy under the button rather than cramming it into the label.
The CTA button checker scores button wording for specificity and clarity, which is a quick way to compare options.
Weak to strong: examples
| Goal | Weak | Stronger | Why it is better |
|---|---|---|---|
| Lead generation | Submit | Get my free quote | Names the benefit, not the action |
| Lead generation | Contact us | Talk to a specialist today | Sets who and when |
| Sales | Buy | Add to basket, free delivery | Repeats a reason to buy at the decision point |
| Sales | Order now | Get the starter kit for £29 | Removes price uncertainty |
| Booking | Book now | Book a free 15-minute call | States cost and length |
| Booking | Schedule | See available times | Lower commitment; shows the next screen |
| Sign-up | Sign up | Start my 14-day free trial | Sets length and price of the commitment |
| Sign-up | Register | Create my free account | Plainer, and "free" answers the first question |
| Content download | Download | Send me the checklist | Matches the offer exactly |
Only state prices, trial lengths and delivery terms that are true for your offer. The point of these examples is the pattern, not the specific numbers.
Placement
Put a CTA on the first screen
Some visitors arrive ready to act, especially from branded search, referrals and retargeting. They should be able to act without scrolling. On mobile, check that the headline, subheadline and button all fit on the first screen. See above the fold.
This does not mean the first screen has to convince everyone. It means people who are already convinced should not be made to hunt.
Repeat it down the page
Visitors who need more information will scroll. Place the CTA again after each major section: after the benefits, after the proof, after the pricing and at the end of the FAQ. Each repeat should ask for the same action, though the surrounding text can change to fit the section.
On long pages, a sticky button bar on mobile can help, provided it does not cover content or form fields.
Put proof next to the button
The moment just before a click is when doubt peaks. A short testimonial, a review rating, or a guarantee placed directly above or below the button answers that doubt at the right time. The trust signals guide covers what works best.
Remove competing links
Every navigation link, social icon and footer link is an alternative to your CTA. Campaign landing pages usually work better with minimal navigation. If you must keep a menu, make sure the CTA is visually stronger than anything in it.
Design
Contrast matters more than colour
There is no magic button colour. What matters is that the button stands out from its background and from other elements on the page. A green button on a green-themed page disappears; the same button on a neutral page is obvious.
A simple test: blur your eyes or step back from the screen. The primary button should still be the most noticeable interactive element.
Contrast also matters for accessibility. Text on the button must be readable against the button colour, and the button must be distinguishable from its surroundings for people with low vision or colour blindness.
Make it look clickable
Buttons should look like buttons: a filled shape with clear padding, not plain text or a faint outline. Ghost buttons (transparent with a thin border) are fine for secondary actions but often too quiet for the main one.
Size for thumbs
On mobile, buttons need to be large enough to tap without zooming and spaced far enough from other links that visitors do not hit the wrong one. Full-width buttons on mobile are a reliable default.
Keep one primary style
Use one colour and style for the primary CTA throughout the page. If several buttons share the same strong style but lead to different places, visitors cannot tell which one matters.
Microcopy under the button
A short line directly under the button can answer the last question in the visitor's mind. Good microcopy is brief and factual:
- "No credit card required."
- "Takes about 2 minutes."
- "We reply within one working day."
- "Free cancellation up to 24 hours before."
- "We never share your email."
Pick the one objection most likely to stop someone at this point. One line is usually enough; three lines of small print starts to look like a disclaimer.
CTAs by goal
Lead generation
The CTA is usually a form submit button. Keep the form short (every extra field is a reason to stop) and make the button describe what they will receive: a quote, a callback, a consultation. Check your form's length with the form friction calculator, and see form friction for the reasoning behind it.
Sales
On ecommerce and direct-purchase pages, the CTA should lead straight to a working purchase path. Show the price near the button, along with delivery and returns information. Avoid sending buyers through extra pages before they can add to basket. See ecommerce landing page audits.
Bookings
For dentists, consultants, coaches and service businesses, a button that opens a booking calendar reduces back-and-forth. "See available times" is a low-pressure first step. If bookings are handled by phone, make the number tappable on mobile. See dental and coaching audits for examples.
Sign-ups
For SaaS and apps, the CTA leads to account creation or a trial. State whether it is free, how long any trial lasts and whether a card is required. A short sign-up flow matters as much as the button. See SaaS landing page audits.
Testing CTAs
Button tests are popular because they are easy to set up, but small changes (one word, a slightly different shade) rarely produce differences you can detect without a lot of traffic. Get more from your tests by:
- Testing meaningfully different offers or commitments ("Book a call" versus "Get a written quote").
- Testing placement (button on first screen versus not) rather than tiny copy tweaks.
- Running the test until it reaches statistical significance. The A/B test significance calculator tells you when you have enough data.
CTA checklist
- One primary action per page.
- Button text says what the visitor gets.
- A CTA is visible on the first screen on mobile.
- The CTA repeats after each major section.
- The button contrasts clearly with its surroundings.
- Proof or a guarantee sits next to the button.
- Microcopy answers the main objection.
- The path behind the button matches the goal: form, checkout, calendar or sign-up.
For the rest of the page, work through the landing page checklist.
Next step
A free PageScore audit checks whether a CTA appears on the first screen, how specific its wording is, how often it repeats and whether the path behind it matches your page's goal.