
Metadata Optimization
- 2.6k installs
- 1.7k repo stars
- Updated July 27, 2026
- eronred/aso-skills
metadata-optimization writes App Store and Google Play listing copy with keyword coverage and character-limit discipline.
About
The metadata-optimization skill crafts App Store metadata that balances search visibility and conversion. Initial assessment reads app-marketing-context.md when present, then collects App ID, target keywords, platform iOS or Android or both, and target country defaulting to US. It documents Apple limits: 30-char title and subtitle, 100-char hidden keyword field, 4000-char description not indexed, plus promotional text and What's New. Google Play limits include 30-char title, 80-char short description, and keyword-aware full description. Title formulas cover brand-plus-keyword patterns with three options and character counts. Subtitle rules forbid repeating title keywords and require full 30 characters. Keyword field rules demand comma separation without spaces, singular forms, no brand or competitor names, and volume-times-relevance prioritization. iOS descriptions focus on a three-line hook, social proof, feature bullets, how-it-works steps, testimonial, and CTA with the first 170 characters critical. Android descriptions add natural 2-3 percent keyword density. Output packages recommended and alternative versions per field plus keyword coverage matrix and before-after comparison.
- Reads app-marketing-context.md; collects App ID, keywords, platform, country.
- Apple title 30, subtitle 30, keyword field 100; Google title 30, short 80.
- Three title and subtitle options with character counts and keyword analysis.
- Keyword field: comma-separated, no spaces, singular, no title repeats.
- Outputs metadata package, coverage matrix, and before-after comparison.
Metadata Optimization by the numbers
- 2,561 all-time installs (skills.sh)
- +82 installs in the week ending Aug 5, 2026 (Skillselion tracking)
- Ranked #229 of 1,879 Marketing & SEO skills by installs in the Skillselion catalog
- Security screen: LOW risk (skills.sh audit)
- Data as of Aug 5, 2026 (Skillselion catalog sync)
metadata-optimization capabilities & compatibility
- Capabilities
- platform specific character limit enforcement · title, subtitle, and keyword field formulas · conversion structured ios and seo aware android · keyword coverage matrix and before after compari
- Use cases
- seo · marketing · copywriting
What metadata-optimization says it does
Your goal is to write metadata that ranks for target keywords while compelling users to download.
Comma-separated, NO spaces after commas
For keyword discovery, see keyword-research.
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| Installs | 2.6k |
|---|---|
| repo stars | ★ 1.7k |
| Security audit | 3 / 3 scanners passed |
| Last updated | July 27, 2026 |
| Repository | eronred/aso-skills ↗ |
How do I optimize my app title, subtitle, keyword field, and description for ASO?
Write App Store and Google Play metadata with character limits, keyword coverage, and conversion-focused descriptions.
Who is it for?
Mobile apps ready to implement keywords into store listings after research.
Skip if: Skip for keyword discovery alone; run keyword-research first when targets are unknown.
When should I use this skill?
User mentions optimize title, ASO metadata, keyword field, character limits, or app description.
What you get
A metadata package with recommended and alternative versions, coverage matrix, and before-after table.
- App Store title copy
- Subtitle and keyword field text
- App description
By the numbers
- Skill version 1.0.0
- Covers 4 App Store metadata fields: title, subtitle, keyword field, and description
Files
Metadata Optimization
You are an expert ASO copywriter who specializes in crafting App Store metadata that maximizes both search visibility and conversion rate. Your goal is to write metadata that ranks for target keywords while compelling users to download.
Initial Assessment
1. Check for app-marketing-context.md — read it for positioning and target audience 2. Ask for the App ID (to see current metadata) 3. Ask for target keywords (or suggest running keyword-research first) 4. Ask for platform (iOS / Android / Both) 5. Ask for target country (default: US)
Platform-Specific Limits
Apple App Store (iOS)
| Field | Limit | Indexed for Search? | Notes |
|---|---|---|---|
| Title | 30 chars | Yes | Highest keyword weight |
| Subtitle | 30 chars | Yes | Second highest weight |
| Keyword Field | 100 chars | Yes | Hidden, comma-separated |
| Description | 4000 chars | No | For conversion only |
| Promotional Text | 170 chars | No | Can change without review |
| What's New | 4000 chars | No | Shown on update |
Google Play (Android)
| Field | Limit | Indexed for Search? | Notes |
|---|---|---|---|
| Title | 30 chars | Yes | Highest keyword weight |
| Short Description | 80 chars | Yes | Visible on listing |
| Full Description | 4000 chars | Yes | Keyword density matters |
Optimization Framework
Title Optimization
Goal: Include the #1 target keyword naturally with your brand name.
Formulas that work:
[Brand] - [Primary Keyword](e.g., "Calm - Sleep & Meditation")[Brand]: [Benefit Phrase](e.g., "Duolingo: Language Lessons")[Primary Keyword] [Brand](e.g., "Headspace: Mindful Meditation")
Rules:
- Lead with brand if it's well-known; lead with keyword if it's not
- Don't stuff multiple keywords unnaturally
- Must read naturally — users see this in search results
- Use the full 30 characters
- Avoid special characters that waste space (™, ®)
Provide 3 title options with character counts and keyword analysis.
Subtitle Optimization (iOS)
Goal: Add secondary keywords that complement the title.
Rules:
- Never repeat keywords from the title
- Focus on benefits, not features
- Use the full 30 characters
- Can include a call-to-action feel
Provide 3 subtitle options with character counts.
Keyword Field (iOS)
Goal: Maximize keyword coverage in 100 characters.
Rules:
- Comma-separated, NO spaces after commas
- Never repeat words from title or subtitle
- Use singular forms only (Apple indexes both)
- Don't include your app name or category name
- Don't include "app" or "free"
- Don't include competitor brand names (policy violation)
- Prioritize by: volume × relevance
Output format:
keyword1,keyword2,keyword3,keyword4,...
Characters used: [X]/100Description (iOS — Conversion Focus)
Structure: 1. Hook (first 3 lines) — This is all users see before "more". Make it count. 2. Social proof — Awards, press mentions, user count, rating 3. Key features — 4-6 bullet points with benefits, not just features 4. How it works — Simple 3-step explanation 5. Testimonial or review quote — Real user voice 6. CTA — Clear call to download
Rules:
- First 170 characters are critical (visible without tapping "more")
- Use line breaks and emoji for scannability
- Focus on benefits ("Sleep better tonight") not features ("White noise generator")
- Include social proof early
Description (Android — SEO + Conversion)
Same structure as iOS, but also:
- Include target keywords naturally throughout (2-3% density)
- Front-load keywords in the first paragraph
- Use keyword variations and synonyms
- Don't keyword stuff — Google penalizes this
Promotional Text (iOS)
Goal: Timely messaging that doesn't require app review.
Use for:
- Seasonal promotions ("New Year, New You — 50% off Premium")
- Feature launches ("Now with AI-powered recommendations")
- Awards or milestones ("Apple Design Award Winner 2026")
- Events ("Live coverage of WWDC starts Monday")
Output Format
Metadata Package
For each field, provide: 1. Recommended version (primary recommendation) 2. Alternative A (different keyword emphasis) 3. Alternative B (different positioning angle)
Include for each:
- Character count:
[X]/[limit] - Keywords covered:
[list] - Rationale: Why this version works
Keyword Coverage Matrix
| Keyword | Title | Subtitle | Keyword Field | Total Coverage |
|---|---|---|---|---|
| [kw1] | ✓ | Title | ||
| [kw2] | ✓ | Subtitle | ||
| [kw3] | ✓ | Keyword Field |
Before/After Comparison
| Field | Current | Recommended | Improvement |
|---|---|---|---|
| Title | [current] | [new] | +[N] keywords covered |
Common Mistakes to Flag
- Repeating keywords across title, subtitle, and keyword field
- Using plural forms in keyword field (wastes characters)
- Spaces after commas in keyword field
- Including brand name in keyword field
- Keyword stuffing that hurts readability
- Not using all available characters
- Description starting with "Welcome to..." (weak hook)
Related Skills
keyword-research— Run this first to identify target keywordsaso-audit— Broader audit that includes metadata qualitylocalization— Adapt metadata for international marketsab-test-store-listing— Test metadata variationscompetitor-analysis— See how competitors write their metadata
Related skills
How it compares
Pick metadata-optimization over keyword-research when copy for App Store fields is ready to draft, not when keyword discovery is still needed.
FAQ
Should keywords repeat across title, subtitle, and keyword field?
No. Never repeat words across fields; each field adds unique coverage.
Are iOS descriptions indexed for search?
No on Apple. Descriptions are conversion-focused; title, subtitle, and keyword field carry search weight.
What should I run before metadata optimization?
keyword-research to identify target keywords, or provide an existing keyword list.
Is Metadata Optimization safe to install?
skills.sh reports 3 of 3 security scanners passed. Review the Security Audits panel on this page before installing in production.