Agent skill

cta-optimizer

Design and optimize call-to-action buttons for maximum conversion. Covers copy psychology, visual design, placement strategy, and A/B testing guidance.

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SKILL.md

CTA Optimizer Skill

Design call-to-action buttons and sections that drive action through psychology-driven copy, strategic placement, and visual prominence.

When to Use

Use /cta-optimizer when you need to:

Audit existing CTAs for effectiveness
Write better CTA button copy
Design visually prominent CTAs
Determine optimal CTA placement
Create CTA sections with supporting copy
Plan A/B tests for CTAs

Instructions

Phase 1: Audit Existing CTAs

Goal: Identify weaknesses in current CTAs

I will evaluate:

Visibility
- Color contrast ratio (≥ 4.5:1)?
- Large enough (min 48x48px for mobile)?
- Enough white space around it?
- Stands out from page content?
Copy
- Action-oriented verb?
- States what user gets?
- Specific vs vague?
- Creates urgency (without manipulation)?
Placement
- Above the fold?
- After value demonstration?
- Repeated at logical intervals?
- Not competing with other CTAs?
Visual Hierarchy
- Primary CTA most prominent?
- Secondary CTAs clearly secondary?
- Tertiary actions de-emphasized?

Audit Checklist:

markdown

- [ ] Visible above fold?
- [ ] High contrast (primary color)?
- [ ] Large enough (48px+ height)?
- [ ] Copy is action-oriented ("Get", "Start", "Download")?
- [ ] States value ("Start Free Trial" not "Submit")?
- [ ] Reduces friction ("No Credit Card" disclaimer)?
- [ ] Mobile-friendly (thumb-reachable)?
- [ ] Only one primary CTA per screen?

Phase 2: Optimize CTA Copy

Goal: Write compelling, action-driving CTA copy

CTA Copy Formula

Structure: [Action Verb] + [What They Get] + [Friction Reducer]

Examples:

❌ Generic	✅ Optimized
Submit	Start Free Trial - No Credit Card
Learn More	See How It Works
Sign Up	Get Instant Access
Download	Download the Free Guide
Click Here	Show Me the Playbook
Continue	Yes, Send Me Tips
Register	Join 10,000+ Marketers
Buy Now	Get Lifetime Access Today

Action Verbs by Goal

Trial Signups:

Start, Begin, Try, Test, Explore, Experience

Downloads:

Download, Get, Grab, Access, Claim

Purchases:

Buy, Get, Unlock, Secure, Upgrade

Email/Newsletter:

Subscribe, Join, Get, Receive, Send

Demos/Calls:

Schedule, Book, Request, See, Watch

Value Statements

What user receives (not what they do):

markdown

❌ "Create Account" (what they do)
✅ "Get Free Access" (what they receive)

❌ "Enter Email" (what they do)
✅ "Send Me the Guide" (what they receive)

❌ "Submit Form" (what they do)
✅ "Get My Custom Quote" (what they receive)

Friction Reducers

Remove objections inline:

markdown

- "No Credit Card Required"
- "Free Forever"
- "Cancel Anytime"
- "Takes 2 Minutes"
- "No Spam, Ever"
- "Instant Access"
- "100% Free"

Urgency (Ethical)

Only use if true:

markdown

✅ Ethical urgency:
- "Limited Spots Available" (if truly limited)
- "Sale Ends Friday" (with real deadline)
- "Early Bird Pricing" (time-based)

❌ Fake urgency:
- "Only 2 left!" (always says 2)
- "Flash sale!" (runs every day)
- "Act now!" (no real urgency)

Phase 3: Optimize CTA Design

Goal: Make CTAs visually prominent and appealing

Color Psychology

Best Practice: Contrast > Specific Color

css

/* ✅ Good - high contrast against background */
.ctaPrimary {
  background: #2563eb; /* Blue */
  color: #ffffff;
  /* Contrast ratio: 8.59:1 (AAA) */
}

/* ❌ Bad - low contrast */
.ctaBad {
  background: #93c5fd; /* Light blue */
  color: #ffffff;
  /* Contrast ratio: 1.93:1 (Fails WCAG) */
}

Color Associations (context-dependent):

Blue: Trust, safety, professionalism
Green: Success, go, positive action
Orange: Friendly, energetic, call-to-action
Red: Urgency, bold action, stop
Purple: Premium, luxury, creativity

Primary CTA Template:

css

.ctaPrimary {
  /* Size */
  min-height: 48px;
  padding: 14px 28px;
  min-width: 200px;

  /* Typography */
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  text-align: center;

  /* Visual */
  background: var(--color-primary, #2563eb);
  color: #ffffff;
  border: none;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);

  /* Interaction */
  cursor: pointer;
  transition: all 0.2s ease;
  -webkit-tap-highlight-color: transparent;
}

.ctaPrimary:hover {
  background: var(--color-primary-dark, #1d4ed8);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
  transform: translateY(-1px);
}

.ctaPrimary:active {
  transform: translateY(0);
  box-shadow: 0 1px 4px rgba(37, 99, 235, 0.3);
}

.ctaPrimary:focus-visible {
  outline: 3px solid var(--color-primary-light, #60a5fa);
  outline-offset: 2px;
}

/* Mobile optimization */
@media (max-width: 640px) {
  .ctaPrimary {
    width: 100%;
    padding: 16px 24px;
    font-size: 17px; /* iOS prevents zoom at 16px+ */
  }
}

Secondary CTA:

css

.ctaSecondary {
  min-height: 48px;
  padding: 14px 28px;

  font-size: 16px;
  font-weight: 600;

  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  border-radius: 8px;

  cursor: pointer;
  transition: all 0.2s ease;
}

.ctaSecondary:hover {
  background: var(--color-primary);
  color: #ffffff;
}

Ghost/Tertiary CTA:

css

.ctaTertiary {
  min-height: 48px;
  padding: 14px 20px;

  font-size: 16px;
  font-weight: 500;
  color: var(--color-text-secondary);

  background: transparent;
  border: none;

  text-decoration: underline;
  cursor: pointer;
  transition: color 0.2s ease;
}

.ctaTertiary:hover {
  color: var(--color-text);
}

White Space

Give CTAs room to breathe:

css

.ctaSection {
  padding: 48px 24px;
  text-align: center;
}

.ctaHeadline {
  margin-bottom: 16px;
  font-size: 32px;
  font-weight: 700;
}

.ctaSubtext {
  margin-bottom: 32px;
  font-size: 18px;
  color: var(--color-text-secondary);
}

.ctaButton {
  /* Isolated with white space */
  margin: 24px 0;
}

.ctaDisclaimer {
  margin-top: 12px;
  font-size: 14px;
  color: var(--color-text-muted);
}

Phase 4: Optimize CTA Placement

Goal: Position CTAs where users are ready to act

Placement Strategy

Hero Section (Above Fold):

html

<section class="hero">
  <h1>Close deals 3x faster with AI-powered sales tools</h1>
  <p>Stop losing deals to slow follow-ups. Automate your outreach and focus on closing.</p>

  <div class="heroCtaGroup">
    <button class="ctaPrimary">Start Free Trial</button>
    <button class="ctaSecondary">Watch 2-Min Demo</button>
  </div>

  <p class="disclaimer">No credit card required • 14-day trial</p>
</section>

After Value Demonstration:

html

<section class="features">
  <h2>Everything you need to scale sales</h2>

  <!-- Feature blocks -->
  <div class="featureGrid">
    <div class="feature">...</div>
    <div class="feature">...</div>
    <div class="feature">...</div>
  </div>

  <!-- CTA after showing value -->
  <div class="ctaSection">
    <h3>Ready to 3x your deals?</h3>
    <button class="ctaPrimary">Get Started Free</button>
  </div>
</section>

Sticky Bottom Bar (Mobile):

css

.stickyCtaMobile {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px;
  padding-bottom: calc(16px + env(safe-area-inset-bottom));
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.1);
  z-index: 1000;
}

@media (min-width: 768px) {
  .stickyCtaMobile {
    display: none; /* Desktop has inline CTAs */
  }
}

Before Footer:

html

<section class="finalCta">
  <h2>Join 10,000+ sales teams closing more deals</h2>
  <p>Start your free trial today - no credit card required</p>
  <button class="ctaPrimary">Get Started Free</button>

  <div class="socialProof">
    <div class="stars">★★★★★</div>
    <p>4.9/5 from 2,000+ reviews</p>
  </div>
</section>

<footer>
  <!-- Footer content -->
</footer>

Placement Rules

DO:

✅ Place primary CTA above the fold
✅ Repeat CTA after value demonstrations
✅ Include CTA before footer
✅ Use sticky mobile CTA for long pages
✅ Place CTA near social proof

DON'T:

❌ Multiple primary CTAs on same screen
❌ CTA before explaining value
❌ Competing CTAs next to each other
❌ CTA in middle of reading flow

Phase 5: CTA Sections with Supporting Copy

Goal: Frame CTAs with compelling context

CTA Section Patterns

Pattern 1: Question + Answer + CTA

html

<div class="ctaSection">
  <h3>Ready to close more deals with less effort?</h3>
  <p>Join 10,000+ sales teams who've 3x'd their pipeline</p>
  <button class="ctaPrimary">Start Free Trial</button>
  <p class="disclaimer">No credit card • Cancel anytime</p>
</div>

Pattern 2: Social Proof + CTA

html

<div class="ctaSection">
  <div class="logoBar">
    <img src="google.svg" alt="Google" />
    <img src="microsoft.svg" alt="Microsoft" />
    <img src="salesforce.svg" alt="Salesforce" />
  </div>
  <h3>Join top companies using our platform</h3>
  <button class="ctaPrimary">Get Started Free</button>
</div>

Pattern 3: Benefit List + CTA

html

<div class="ctaSection">
  <h3>Start your free trial and get:</h3>
  <ul class="benefits">
    <li>✓ Full access to all features</li>
    <li>✓ Personal onboarding session</li>
    <li>✓ Cancel anytime, no questions asked</li>
  </ul>
  <button class="ctaPrimary">Start Free Trial</button>
</div>

Pattern 4: Urgency + CTA

html

<div class="ctaSection">
  <div class="urgencyBadge">Limited Time Offer</div>
  <h3>Get 50% off your first year</h3>
  <p>Offer ends Friday, May 31st</p>
  <button class="ctaPrimary">Claim Your Discount</button>
  <p class="countdown">Ends in 2 days, 14 hours</p>
</div>

CTA Optimization Checklist

Copy

Uses action verb (Get, Start, Download, Join)?
States what user receives (not what they do)?
Specific vs vague ("Start Free Trial" not "Sign Up")?
Includes friction reducer if needed?
Creates urgency (only if ethical/true)?
Consistent across page?

Design

High contrast against background (≥ 4.5:1)?
Large enough for mobile (≥ 48px height)?
Stands out visually (color, size, shadow)?
Adequate white space around it?
Clear hover/active states?
Focus indicator visible?

Placement

Primary CTA above the fold?
Repeated after value demos?
Included before footer?
Only one primary CTA per screen?
Near social proof when possible?
Sticky bar on mobile for long pages?

Hierarchy

Primary CTA most prominent?
Secondary CTA clearly less prominent?
Tertiary actions de-emphasized (text links)?
No competing CTAs side-by-side?

Mobile

Touch target ≥ 48x48px?
Full-width or centered appropriately?
Text size prevents zoom (≥ 16px)?
Thumb-reachable (bottom half preferred)?

A/B Testing Guidance

What to Test First (Highest Impact)

1. CTA Copy (Easiest, highest ROI)

Test: "Get Started" vs "Start Free Trial"
Test: With/without friction reducer
Test: Benefit-focused vs action-focused

2. CTA Color (Easy, moderate ROI)

Test: Primary brand color vs high-contrast alternative
Test: Solid vs gradient backgrounds
Must maintain contrast ratio

3. CTA Placement (Moderate difficulty, high ROI)

Test: Above fold only vs repeated throughout
Test: Sticky mobile bar vs inline only
Test: Before vs after social proof

4. CTA Size (Easy, moderate ROI)

Test: Standard (48px) vs large (60px)
Test: Padding variations
Test: Full-width vs auto-width

5. Supporting Copy (Moderate, moderate ROI)

Test: With vs without subtext
Test: Urgency messaging variations
Test: Social proof placement

Sample Hypothesis

markdown

**Hypothesis**: Adding "No Credit Card Required" to CTA will increase trial signups by 15-25%

**Rationale**: Credit card requirement is #1 objection in surveys

**Test**:
- Control: "Start Free Trial"
- Variant: "Start Free Trial - No Credit Card Required"

**Success Metric**: Trial signup conversion rate
**Duration**: 2 weeks or 1,000 conversions
**Statistical Significance**: 95% confidence

Output Format

markdown

## CTA Optimization Report

### Current State
**Primary CTA**: "Submit"
**Issues Identified**:
- Generic copy ("Submit" doesn't state value)
- Low contrast (3.2:1, below WCAG AA)
- Below fold on mobile
- No friction reducer

### Optimized CTAs

**Primary CTA**:
- Copy: "Start Free Trial - No Credit Card"
- Color: #2563eb (8.59:1 contrast ratio)
- Size: 48px height, full-width on mobile
- Placement: Hero (above fold), after features, before footer

**Secondary CTA**:
- Copy: "Watch 2-Min Demo"
- Style: Outlined button
- Placement: Hero (next to primary)

**Tertiary CTA**:
- Copy: "See Pricing"
- Style: Text link
- Placement: Navigation

### CTA Sections Added
1. Hero section CTA with social proof
2. Post-feature CTA with benefit list
3. Final CTA before footer
4. Sticky mobile bar for long-scroll pages

### Files Modified
- `[filepath]` - Hero CTA
- `[filepath]` - CTA button styles
- `[filepath]` - CTA sections
- `[filepath]` - Mobile sticky bar

### A/B Test Recommendations
**Test 1**: CTA copy
- Control: "Start Free Trial"
- Variant: "Get Instant Access"
- Expected lift: +10-15%

**Test 2**: CTA placement
- Control: Hero only
- Variant: Hero + repeated throughout
- Expected lift: +20-30%

Integration with Other Skills

/conversion-audit - Use to identify CTA issues
/copywriting-guide - Create compelling CTA copy
/social-proof - Place CTAs near social proof
/mobile-patterns - Optimize CTA placement for mobile

Notes

Test on real devices - mobile CTA experience differs from desktop
Contrast ratio tools: WebAIM, Coolors, Stark
One primary CTA per page/screen - don't confuse users
Urgency works but only if ethical (real deadlines only)
Friction reducers can increase conversions by 10-30%
CTA copy matters more than color (test copy first)
Mobile users often need CTAs repeated (sticky bar helps)

Maintainer

majiayu000 Core maintainer

Source details

Full Name: majiayu000/claude-skill-registry
Branch: main
Path in repo: skills/other/other/cta-optimizer
License: MIT License

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SKILL.md

CTA Optimizer Skill

When to Use

Instructions

Phase 1: Audit Existing CTAs

Phase 2: Optimize CTA Copy

CTA Copy Formula

Action Verbs by Goal

Value Statements

Friction Reducers

Urgency (Ethical)

Phase 3: Optimize CTA Design

Color Psychology

White Space

Phase 4: Optimize CTA Placement

Placement Strategy

Placement Rules

Phase 5: CTA Sections with Supporting Copy

CTA Section Patterns

CTA Optimization Checklist

Copy

Design

Placement

Hierarchy

Mobile

A/B Testing Guidance

What to Test First (Highest Impact)

Sample Hypothesis

Output Format

Integration with Other Skills

Notes

Recommended Agent Skills

agent-ops-spec

agent-ops-state

agent-ops-spec

agent-ops-testing

agent-ops-testing

agent-ops-state