Identical generic alt across colors reduces usefulness. A large original image can slow mobile loading.
Image SEO: descriptions, dimensions and appropriate formats
Use relevant images with descriptive alt text and reserved layout space. Formats should support quality and loading, not keyword quotas.
Research context: Google Search Central · Image SEO ↗
Alt describes meaningful image content; decorative images need no invented product explanation.
Try the pattern
Task and expected result
- 01
Change color: main-image alt should follow the color.
- 02
Inspect mobile and check the image causes no horizontal overflow.
- 03
Check below-the-fold images are not all given highest priority.
How to investigate value
Check crawling, indexing choices, canonicals and language. Later use Search Console to assess relevant queries and task success after arrival.
Watch for side effects
Duplicates, wrong languages, stale titles, false product schema and traffic to pages that do not solve the query.
This is a proposed investigation, not a measured result. Choose one hypothesis and define the audience before testing.
Build a measurement plan for this concept ↗