Call to Action (CTA)
A prompt that directs visitors to take a specific, desired action — a button, link, or form that initiates conversion.
A call to action (CTA) is a prompt on a webpage, email, or ad that directs the visitor to take a specific desired action. CTAs are the conversion mechanism — the bridge between visitor intent and business outcome.
The most common form is a button (“Book Your Free Audit →”), but CTAs also include text links, form submission prompts, and inline text directives.
CTA Copy: The Highest-Leverage Element
CTA button copy is one of the most frequently tested — and highest-impact — elements in conversion optimisation. Small copy changes drive significant results:
| Weak CTA | Strong CTA | Why |
|---|---|---|
| ”Submit" | "Get My Free Report” | Benefit-led, first-person |
| ”Sign Up" | "Start My Free Trial” | Action-oriented, specific |
| ”Click Here" | "Book a Free Strategy Call” | Descriptive, reduces ambiguity |
| ”Learn More" | "See How It Works →“ | Direction + curiosity |
First-person copy consistently outperforms second-person: “Get My Free Audit” vs “Get Your Free Audit.” Multiple A/B tests show first-person variants win by 20–90% in different contexts. The psychology: first-person copy feels like the visitor is completing their own thought.
CTA Placement
Above the fold — Always. Your primary CTA must be visible without scrolling on every device.
Adjacent to social proof — Visitors look for reassurance at the moment of decision. A testimonial or review count next to the CTA button reduces anxiety and increases clicks.
Repeated down the page — Every 300–400px of vertical scroll on long pages. A visitor who reads to the bottom is highly interested — give them a CTA where they are.
In-line with benefit statements — “Our clients see 127% CVR improvement within 90 days. [Book a Free Audit →]” — the CTA follows directly from the credibility claim.
CTA Design Principles
Contrast is critical. The CTA button colour should appear nowhere else on the page. If your site is green and white, a green button disappears. A different colour for the CTA button creates visual hierarchy that draws the eye.
Size matters. Mobile CTA buttons must be a minimum of 48px height for comfortable thumb tapping. Desktop buttons of 44–52px height perform consistently better than smaller variants.
Whitespace isolates. Surrounding the CTA button with empty space increases visual emphasis without changing the copy or colour. Cluttered CTAs get fewer clicks.
What to Test on Your CTA
Priority order for A/B testing:
- Button copy — Biggest impact, easiest to test
- Button colour — Only meaningful if the current colour has no contrast
- Placement — Above vs below vs within content
- Size — Particularly on mobile
- Surrounding copy — The sentence above the button often affects clicks as much as the button itself
A single A/B test on CTA copy can yield 20–50% improvement. It’s one of the fastest wins in any CRO programme.
Frequently Asked Questions
What is a call to action (CTA)?
A call to action (CTA) is any prompt that directs a website visitor to take a specific desired action. CTAs are most commonly buttons ("Book a Free Audit", "Start My Free Trial") but can also be links, forms, or any interactive element. An effective CTA is action-oriented, benefit-focused, and placed where visitors are ready to convert — typically above the fold and adjacent to social proof.
What makes a good CTA button?
A high-converting CTA button has: (1) action-oriented, first-person copy ('Start My Trial' beats 'Submit'), (2) a specific benefit stated in the button text, (3) high visual contrast against the surrounding page, (4) placement above the fold and repeated every 300–400px, (5) no competing CTAs nearby. Multiple studies show first-person CTA copy ('Get My Free Report') outperforms second-person ('Get Your Free Report') by up to 90%.
How many CTAs should a landing page have?
A landing page should have one primary CTA — one specific action you want visitors to take. However, this CTA should appear multiple times down the page (above the fold, mid-page, at the bottom). Having multiple different CTAs (e.g., 'book a call' and 'download the guide' and 'view pricing') creates decision paralysis and reduces overall conversion rate.