Originally published: November 23, 2022 · Last updated: August 14, 2026
Images can improve a page because they explain, demonstrate and attract attention. They can also create visibility in Google Images and other visual search surfaces. Good image SEO starts with useful visuals and clear context, not with trying to force keywords into every image field.
Use images that belong on the page
Google uses the surrounding page content to understand an image. A relevant original photo beside useful text gives both users and search engines more context than a generic image placed only for decoration.
Put important images close to the text they illustrate and make sure the page itself clearly covers the subject shown in the image.
Write useful alt text
Alt text helps describe meaningful images when they cannot be seen and also provides context to search engines. Describe what matters in the context of the page.
For example, a photograph of a ceramic artist shaping a bowl can simply describe that scene. It does not need a list of SEO phrases. Decorative images that add no information should not be forced to carry a descriptive message.
Use descriptive filenames when practical
A clear filename is more useful than a random camera number. Rename important images before upload when that fits your workflow, but do not spend hours renaming an entire old media library only because you hope it will improve rankings.
Keep images sharp but efficient
High-quality images are valuable, but oversized files can slow down a page. Resize large originals to realistic dimensions and use sensible compression. WordPress can then create smaller versions for different screen sizes.
Modern formats such as WebP and AVIF can help reduce file size, but the format is only one part of optimization. Dimensions and compression still matter.
Preserve responsive image delivery
WordPress normally creates multiple sizes from one uploaded image so browsers can use an appropriate version for the screen and layout. Avoid replacing that behavior with one oversized image unless there is a specific reason.
Choose a representative main image
Search engines and social platforms may select an image as a preview for a page. Important articles and landing pages should therefore have a relevant, high-quality main visual rather than relying on a logo or an unrelated decorative graphic.
Keep image rights clear
Search visibility does not create permission to use an image. Keep records of licenses and required credits for third-party material. For photographers, artists and image-heavy publishers, creator and licensing information can also be useful metadata.
Image SEO checklist
- Use a relevant image on a relevant page.
- Write useful alt text for meaningful images.
- Use descriptive filenames when practical.
- Resize and compress images before they become a performance problem.
- Keep WordPress responsive image behavior intact.
- Choose a representative main image for important pages.
- Document image rights and credits.
The practical rule
Optimize images first for meaning and usability, then for discovery. The strongest image SEO usually comes from a relevant page, a genuinely useful visual, clear descriptive context and sensible delivery.
Official reference: Google Image SEO best practices.