LLazy Loading

Lazy loading is a web optimisation technique that defers the loading of non-critical resources—typically images, videos, and other media—until they're actually needed. Instead of loading everything when a page first opens, lazy loading waits until a user scrolls to that content before fetching it from the server.

For business owners, this matters because it directly impacts how quickly your site performs. Faster pages mean better user experience, higher search rankings, and improved conversion rates. A study by Google found that 53% of mobile users abandon sites that take longer than three seconds to load. By implementing lazy loading, you reduce initial page weight and server requests, which translates to quicker first impressions and better engagement.

The mechanics are straightforward: your browser detects when a user is about to view a section of the page (typically using an Intersection Observer API) and only then fetches the required images or content. This approach is particularly valuable for pages with many images—like product galleries, portfolios, or content-rich blogs—where downloading everything upfront would waste bandwidth and processing power.

Lazy loading also improves Core Web Vitals scores, which Google uses to rank websites. Reducing Largest Contentful Paint (LCP) and Cumulative Layout Shift through lazy loading can directly boost your search visibility and organic traffic.