name: substack-post-crafter description: | Craft Substack newsletter posts optimized for engagement, open rates, and subscriber growth. Use when writing headlines/subject lines, structuring posts, crafting hooks, writing teasers for next issues, or adapting content between newsletter and Notes. Includes email-first optimization, the cliff-hanger technique, SEO integration, and Spanish-language patterns.

Substack Post Crafter Skill

The Email-First Mindset

Substack is primarily email. Every design decision should optimize for:

1. Subject line (determines open)
2. Preview text (first 40-90 chars of subtitle)
3. Hook (determines if they keep reading)
4. Mobile readability (80% of email opens are on mobile)

Subject Line Mastery

Your subject line = your post title. It determines everything.

The 7-Word Rule

Studies show 7 words hit the sweet spot between too short and too long. Aim for 30-50 characters to fit mobile screens.

Subject Line Formulas

Curiosity Gap:

"The mistake everyone makes with [topic]"
"Why [common belief] is wrong"
"I finally figured out [thing]"

Value-Forward:

"How to [achieve result] in [timeframe]"
"[Number] ways to [accomplish goal]"
"The complete guide to [topic]"

Story Hook:

"What happened when I [did thing]"
"I almost gave up on [thing]. Then..."
"The day everything changed"

Direct/Clear:

"[Topic]: What you need to know"
"Your weekly [topic] update"
"[Specific thing] explained"

What NOT to Do

• Clickbait that doesn't deliver
• ALL CAPS or excessive punctuation!!!
• Vague titles that could be anything
• Too clever/cute (clarity > cleverness)

A/B Testing

Available for publications with 200+ subscribers. Substack tests two titles with a portion of your list, then sends the winner to the rest.

Open Rate Benchmarks

Caveat: Apple Mail Privacy Protection inflates open rates. Focus on click-through rates and replies for accurate signals.

Post Structure

The Anatomy of a High-Performing Post

TITLE (Subject Line)
↓
SUBTITLE (Preview text — first 40-90 chars visible)
↓
HOOK (First 1-2 paragraphs — stops the scroll)
↓
BODY (The value — structured, scannable)
↓
TEASER (Cliffhanger for next issue)
↓
CTA (What you want them to do)

The Hook

80% of readers never get past the headline. Your hook determines if they read the body.

Hook Strategies:

1. Start with the payoff

   • Don't bury the lead
   • "Here's the thing no one tells you about [X]..."

2. Open with story

   • Immediate scene, not setup
   • "Last Tuesday, I almost deleted everything..."

3. Provocative question

   • Challenge assumptions
   • "What if everything you know about [X] is wrong?"

4. Bold statement

   • Take a clear position
   • "[Common practice] is killing your [outcome]."

Common mistake: Your best hook is often buried 3-5 paragraphs in. During revision, ask: "Where does this get interesting?"

Body Structure

For Scanners (Most Readers):

• Short paragraphs (2-3 sentences max)
• Subheadings every 200-300 words
• Bullet points for lists
• Bold key phrases
• Pull quotes for emphasis

Formatting Best Practices:

• One idea per paragraph
• White space is your friend
• Use horizontal rules to separate sections
• Images break up long text
• Consider mobile first

The Cliff-Hanger Technique

One creator accidentally discovered that ending posts with specific previews of upcoming content increased their next issue's open rate from 34% to 74%.

How to Implement

Instead of:

See you next week!

Do this:

Next week: I'm breaking down the exact system I used to
[achieve result] — including the template I use every day.

You won't want to miss this one.

Template

Coming next [day]:

→ [Specific, compelling preview of content]
→ [What they'll learn or get]
→ [Why it matters to them]

Make sure you don't miss it.

This creates anticipation and primes subscribers to open.

Notes vs Newsletter

Notes and newsletters serve different purposes:

Repurposing Content

Newsletter → Notes:

• Pull key insight as standalone Note
• Share a provocative quote
• Ask a question the newsletter answers
• Post "teaser" with link to full issue

Notes → Newsletter:

• Expand well-received Notes into full posts
• Compile related Notes into a newsletter
• Use Notes engagement to validate topics

SEO Integration

Substack posts can rank on Google. For tacosdedatos (educational content), this matters.

SEO Basics for Substack

1. Target long-tail keywords

   • Not: "pandas tutorial"
   • Yes: "pandas groupby tutorial español paso a paso"

2. Keyword placement

   • Title (subject line)
   • Subtitle
   • First paragraph
   • Subheadings
   • Naturally throughout

3. Connect Google Search Console

   • Monitor rankings
   • Identify opportunities

4. Evergreen vs Timely

   • Evergreen content = long-term SEO value
   • Balance with timely/news content

Substack SEO Reality

• Google now crawls Substack posts within hours (median: 3 hours)
• Custom domains may rank slightly better than .substack.com
• High-quality, specific content performs best

Spanish-Language Patterns

For tacosdedatos

Headline Style:

"Cómo [lograr resultado] con [herramienta]"
"La guía completa de [tema] en español"
"[Número] errores que cometes con [tema]"
"Lo que nadie te dice sobre [tema]"

Hook Style:

Directo al grano. Sin rodeos.

[Primera oración impactante que establece el tema]

En este newsletter vamos a ver:
→ [Punto 1]
→ [Punto 2]
→ [Punto 3]

Closing Style:

La próxima semana:

Vamos a profundizar en [tema específico] — incluyendo
[algo concreto y valioso].

Nos vemos el [día].

— [Nombre]

LATAM Considerations

• Spanish-speaking Substack community is small but growing (+1,514% growth possible)
• Platform is Anglo-centric but opportunity exists
• Collaborate with other Hispanic creators
• Use Mexican Spanish for tacosdedatos audience

Welcome Email Optimization

The most-opened email you'll ever send.

Best Practices

• Length: 50-125 words optimal (50% response rates)
• Tone: Sounds like YOU, not corporate
• Include: Upgrade CTA above the fold (for free tier)
• Ask: Reply with why they subscribed
• Guide: Link to best posts or "Start Here"
• Deliverability: Ask to move to Primary tab / add to contacts

Template Structure

Subject: Bienvenido/a a tacosdedatos

[1-2 sentence personal greeting]

[What they can expect: frequency, topics]

[1 specific CTA — reply, read this post, etc.]

[Brief upgrade mention if applicable]

[Sign-off]

Post Checklist

Before publishing:

## Pre-Publish Checklist

### Title/Subject Line
- [ ] Under 50 characters / 7 words
- [ ] Clear value or curiosity hook
- [ ] Would I open this?

### Subtitle/Preview
- [ ] First 40-90 chars compelling
- [ ] Expands on title, doesn't repeat

### Hook (First 1-2 paragraphs)
- [ ] Immediately engaging
- [ ] Best hook not buried
- [ ] Clear what post is about

### Body
- [ ] Short paragraphs
- [ ] Subheadings for scanning
- [ ] Mobile-friendly formatting
- [ ] Key points bolded

### Teaser (End)
- [ ] Specific preview of next issue
- [ ] Creates anticipation

### CTA
- [ ] Clear next step
- [ ] Upgrade mention (if appropriate)

### SEO (if applicable)
- [ ] Keyword in title
- [ ] Keyword in first paragraph
- [ ] Descriptive subtitle

Output Format

When crafting Substack posts:

## Newsletter Post: [Topic]

### Title (Subject Line)
[Under 50 chars, 7 words]

### Subtitle (Preview Text)
[First 40-90 chars will show in inbox]

### Hook
[Opening 1-2 paragraphs]

### Body Outline
- [Section 1]
- [Section 2]
- [Section 3]

### Teaser for Next Issue
[Specific, compelling preview]

### CTA
[What you want readers to do]

### Specs
- **Word count**: [Target]
- **Reading time**: [X minutes]
- **SEO keywords**: [If applicable]
- **Publish day**: [Optimal day]

### Notes Version
[Snackable version for Notes feed]

References

For algorithm research, source links, and detailed tactics, see references/REFERENCES.md.