1. Start from intent, not file format
Classify each image by function: hero, product detail, supporting visual, thumbnail, or social preview. Your format and quality decisions should follow that role.
2. Map format by image behavior
Photos usually compress better as JPEG/WebP, while strict transparency elements may need PNG or optimized alternatives. Avoid one-format-for-all workflows.
3. Standardize naming and alt-text rules
Use descriptive, stable filenames tied to page context. Alt text should describe purpose, not repeat keyword lists.
4. Generate responsive sizes from real breakpoints
Create width variants based on actual layout slots and use `srcset/sizes` consistently so mobile users do not download desktop-sized assets.
5. Apply quality gates before publish
Do side-by-side review for edges, gradients, and text overlays. Track a target range for size reduction and reject outputs that visibly degrade key details.
6. Clean metadata and ownership traces where needed
Strip non-essential metadata before public distribution, especially for images created on personal devices or containing location-sensitive details.
7. Align image loading strategy with Core Web Vitals
Avoid lazy-loading critical above-the-fold hero images. Reserve priority for LCP targets and lazy-load lower-priority galleries and decorative media.
8. Use a repeatable QA checklist per release
Document the final review checklist and run it on every content release. Image SEO becomes reliable when it is operationalized, not improvised.
Release Checklist
- Every image has a role, target dimension, and approved format.
- Critical images are exempted from lazy loading.
- Filenames and alt text are context-specific and readable.
- Compression decisions were visually validated on mobile and desktop.
- Metadata and privacy-sensitive traces were reviewed before publish.