What is Image Alt Text? Complete Guide to SEO-Friendly Image Optimization

What is Image Alt Text?

Image Alt Text (alternative text) is a short written description of an image that helps search engines and visually impaired users understand what the image shows. It appears in the image’s HTML code and is essential for SEO and accessibility.

Why Image Alt Text Is Important

• Improves SEO: Helps Google index images correctly, making them appear in image searches.
• Accessibility: Screen readers read alt text aloud for users with visual impairments.
• Better User Experience: Provides context if images fail to load.

How to Write Effective Alt Text

• Be descriptive and specific (e.g., “Golden retriever playing fetch in the park”).
• Include relevant keywords naturally.
• Avoid keyword stuffing or vague phrases like “image123.”
• Keep it concise—under 125 characters is ideal.

Best Practices

• Every important image should have alt text.
• Skip decorative images (use empty alt="").
• Use consistent keyword strategy across visuals.

Optimized image alt text enhances accessibility, user experience, and SEO visibility simultaneously.