Question: What is lazy loading?
- A technique that involves loading non-critical assets on a page only when needed
- A type of responsive website design
- A strategy that involves combining image resources by utilizing image sprites
- A tactic to improve page speed by loading JavaScript asynchronously
Explanation
Lazy loading defers the loading of non-critical assets, such as images or videos, until they are needed, typically when a user scrolls them into view. This reduces initial page load time and server requests, improving user experience. It also helps optimize Largest Contentful Paint (LCP) and overall Page Experience metrics. Implementing lazy loading supports faster SEO performance without sacrificing content availability.
Why the other options are incorrect
B) Lazy loading is not a type of responsive design.
C) Combining images via sprites reduces requests but is not lazy loading.
D) Loading JavaScript asynchronously improves speed but is distinct from lazy loading of assets.
Source for verification
HubSpot Academy: Technical SEO Audit
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