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Image Alt Text: Accessibility and SEO Done Right
A practical DomainLens guide to Image Alt Text: Accessibility and SEO Done Right, focused on descriptive alt, decorative images, lazy loading, image sitemaps.
Run a fresh DomainLens audit and use the report as your priority list.
Overview
Image Alt Text: Accessibility and SEO Done Right is useful when you need a clear way to separate cosmetic SEO work from issues that can block crawling, indexing, rankings, or search snippets. Start with evidence, then decide what deserves engineering time.
Use an automated audit to collect the baseline, then review the page manually for context, search intent, and business priority.
Why it matters
The most common problems usually sit around descriptive alt, decorative images, lazy loading, image sitemaps. These signals influence how easily search engines discover pages, understand content, and trust the final URL they should rank.
A good SEO workflow turns these checks into a short fix list with owner, impact, effort, and validation steps.
What to check
- Review descriptive alt and record the current state, expected state, and exact URL affected.
- Review decorative images and record the current state, expected state, and exact URL affected.
- Review lazy loading and record the current state, expected state, and exact URL affected.
- Review image sitemaps and record the current state, expected state, and exact URL affected.
Common mistakes
- Fixing descriptive alt without validating the rendered page, canonical target, and indexability after deployment.
- Fixing decorative images without validating the rendered page, canonical target, and indexability after deployment.
- Fixing lazy loading without validating the rendered page, canonical target, and indexability after deployment.
- Fixing image sitemaps without validating the rendered page, canonical target, and indexability after deployment.
Next step
Run a fresh DomainLens audit, compare the report with this guide, and prioritize fixes that affect indexability, snippets, internal linking, or Core Web Vitals first.