Image SEO Optimization: Complete Guide
Key Takeaways
- Descriptive file names help search engines understand images
- Alt text is crucial for accessibility and SEO
- Compressed images improve page speed
- WebP format offers best compression with quality
- Lazy loading improves initial page load time
Image File Names
Use descriptive, keyword-rich file names. Instead of "IMG_1234.jpg," use "singapore-web-design-office.jpg." Separate words with hyphens. This helps search engines understand image content.
Alt Text Best Practices
- Describe the image content accurately
- Include target keyword naturally
- Keep under 125 characters
- Don't start with "image of" or "picture of"
- Be specific and descriptive
Image Compression
- Format: WebP for best compression, JPEG for photos, PNG for graphics
- Size: Resize to display dimensions
- Compression: 80-85% quality usually sufficient
- Tools: TinyPNG, Squoosh, ImageOptim
Technical Image SEO
- Implement lazy loading for below-fold images
- Use responsive images with srcset
- Specify width and height to prevent CLS
- Create image sitemaps for important images
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