Image and Video Optimization for Core Web Vitals
Media optimization reduces unnecessary bytes while preserving the image's purpose. Start with what the page actually loads, especially the largest visible image, rather than counting every file in the project.
What to do first
Measure the image dimensions required by the layout and generate suitable responsive sizes.
Implementation and review
- Use appropriate compression and formats, reserve layout space and lazy-load below-fold media.
- Keep the actual hero image readily discoverable and verify the mobile result after deployment.
What to watch for
Do not lazy-load the LCP image or assume that a smaller file guarantees a passing field score.
A practical example to work through
An SVG can contain a large embedded bitmap even though its filename suggests a lightweight vector. Inspect the actual content and displayed size before choosing an optimization. Keep transparent logos readable against the page background and retain original files for comparison. Measure the page's active requests afterward so unused media is not blamed for the live loading experience.
| Dimension | What to check | How to evaluate it |
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References and further reading
References explain platform behavior; they are not independent verification of portfolio results. Check current documentation before implementation.
Need help applying this? Explore consulting services or review the project results.
Frequently Asked Questions
What is the first step?
Measure the image dimensions required by the layout and generate suitable responsive sizes.
What should I avoid?
Do not lazy-load the LCP image or assume that a smaller file guarantees a passing field score.
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