HTML & CSS QualityLesson 35Free preview
Performance
This lesson is part of Intro to HTML & CSS · All levels
Summary
Page speed affects user experience and search rankings. This material discusses how to optimize CSS, images, and content loading. With practices like compression, lazy loading, and critical CSS, pages feel light on a variety of devices.
Key points
- Minimize unused CSS and compress the asset file
- Images are usually the largest portion of downloads; use compression, modern formatting, and lazy loading
- Measure results with Lighthouse and DevTools, not guesses
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