Glossary Terms
Lazy loading
Delaying the loading of parts of a page until they are actually needed, as the visitor scrolls.
Lazy loading delays loading parts of a page until they’re actually needed, usually as the visitor scrolls down to them. That cuts the weight of the initial load, which helps a lot on long, image-heavy pages. Done carelessly, though, it can cause the layout to jump or hold up content the visitor needs right away, so it belongs below the fold, not on your hero image. A concrete example: a blog post with a hero image at the top set to lazy-load, so it stays blank for a beat while the browser decides whether the image is worth fetching yet. That single choice can add a visible flash to the page a visitor sees within the first second, which is exactly the moment a slow site loses trust. The fix is straightforward: eager-load anything above the fold and lazy-load everything below it, so the technique only ever removes weight the visitor was never waiting on.
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