Cara Menulis Alt Text Gambar yang SEO Friendly

Alt text (alternative text) adalah deskripsi teks untuk gambar yang membantu search engines dan screen readers memahami konten visual. Penting untuk SEO dan aksesibilitas.

Apa itu Alt Text?

<img src="image.webp" alt="Deskripsi gambar di sini">

Alt text muncul ketika:
– Image gagal load
– Screen reader membaca halaman
– Search engine menganalisis halaman

Kenapa Alt Text Penting?

SEO benefits:
✓ Google Image search ranking
✓ Context untuk search engines
✓ Additional keyword opportunity
✓ Image SEO optimization

Accessibility benefits:
✓ Screen reader support
✓ Visual impairment users
✓ Slow connection fallback
✓ Legal compliance (some countries)

Best Practices Alt Text

1. Be Descriptive but Concise

Ideal length: 125 characters or less

BAD:
alt="image"
alt="photo"
alt=""

GOOD:
alt="Diagram showing SEO keyword research process"
alt="Red running shoes Nike Air Max on white background"

2. Describe What’s in the Image

Focus on:
- Main subject
- Action happening
- Important details
- Context if relevant

Example image: Person typing on laptop

BAD:
alt="person computer"

GOOD:
alt="Freelancer working on SEO audit using laptop at cafe"

3. Include Keywords Naturally

DO:
Include target keyword if relevant
Natural integration

DON'T:
Keyword stuff
Force irrelevant keywords

Example for SEO article:
GOOD: alt="Screenshot of Google Search Console performance report"
BAD: alt="SEO SEO tools SEO software SEO platform"

4. Don’t Start with “Image of” or “Picture of”

Screen readers already announce it's an image

BAD:
alt="Image of a laptop"
alt="Picture of sunset"

GOOD:
alt="MacBook Pro on wooden desk"
alt="Sunset over Jakarta skyline"

5. Context Matters

Same image, different contexts:

For product page:
alt="Nike Air Max 270 running shoes, black and white"

For blog about shoe cleaning:
alt="Dirty running shoes before cleaning process"

For fashion article:
alt="Athletic streetwear look featuring Nike sneakers"

Alt Text untuk Berbagai Image Types

Product Images

Include:
- Product name
- Brand
- Key features
- Color/size if relevant

Example:
alt="iPhone 15 Pro Max 256GB Natural Titanium - front view"

Screenshots

Describe what the screenshot shows:

alt="Google Analytics dashboard showing organic traffic increase"
alt="WordPress plugin settings page for Yoast SEO"

Infographics

Summarize the key information:

alt="Infographic showing 10 steps of SEO audit process"
alt="Statistics chart comparing CPC across industries"

Stock Photos

Describe the scene relevantly to content:

For leadership article:
alt="Business team meeting in modern office"

For remote work article:
alt="Woman working remotely from home office"

Decorative Images

If purely decorative, use empty alt:
alt=""

Or use CSS background instead

Examples of decorative:
- Design elements
- Spacer images
- Background patterns

Logos

For logos:
alt="[Brand Name] logo"

Examples:
alt="Google logo"
alt="Nike swoosh logo"

Charts and Graphs

Describe the data/conclusion:

alt="Bar chart showing SEO traffic growth 200% year over year"
alt="Pie chart of traffic sources: organic 60%, direct 25%, social 15%"

Common Mistakes

❌ Empty alt text on important images
❌ "Image" or "Photo" as alt text
❌ Keyword stuffing
❌ Too long (over 125 chars)
❌ Not describing actual image
❌ Same alt text for all images
❌ Ignoring context

Alt Text Audit

Finding Missing Alt Text

Tools:
1. Screaming Frog
   - Images > Missing Alt Text

2. Browser extensions
   - Web Developer Toolbar
   - SEO Meta in 1 Click

3. Google Search Console
   - May flag as issue

Audit Process

1. Crawl website
2. Export images without alt
3. Prioritize by importance
4. Write alt text for each
5. Update in CMS/code
6. Verify implementation

Alt Text Template

Product: [Brand] [Product Name] [Key Feature] [Color/Variant]
Person: [Who] [Action] [Location/Context]
Screenshot: [App/Tool] [Feature/Page] showing [Key Info]
Chart: [Chart Type] showing [Data Summary]
Location: [Place/Scene] [Notable Features]

Checklist Alt Text

For every image:
☐ Is it descriptive?
☐ Under 125 characters?
☐ Includes relevant keyword (naturally)?
☐ No "image of" prefix?
☐ Matches image content?
☐ Provides context?
☐ Unique (not copy-paste)?

For decorative images:
☐ Empty alt="" or CSS background

Kesimpulan

Alt text adalah small but important SEO element. Luangkan waktu untuk menulis alt text yang deskriptif dan natural – ini membantu SEO sekaligus membuat website lebih accessible.