Lazy Loading.
Learn what Lazy Loading means in modern search and SEO.
A technique that defers the loading of non-critical resources—images, videos, iframes—until they are about to enter the viewport.
Lazy loading delays the fetching of offscreen resources until a user scrolls close to them. By loading only what is immediately visible, pages reduce initial payload size and improve Time to Interactive (TTI) and Largest Contentful Paint (LCP) scores.
Implementing Lazy Loading
The HTML `loading='lazy'` attribute on `<img>` and `<iframe>` elements enables native browser lazy loading with no JavaScript required. For more complex cases, the Intersection Observer API allows fine-grained control over when elements load.
SEO Considerations
Images that are lazy-loaded must still have descriptive `alt` attributes, proper file names, and be accessible to Googlebot during rendering. Avoid lazy-loading above-the-fold images—those should load eagerly to protect LCP scores.
Articles about Lazy Loading
Read more on the Aergos blog.
The Complete Technical SEO Handbook: August 2025 Edition
This is the technical SEO reference you bookmark and come back to. Updated for August 2025, this guide covers every foundational and advanced technical discipline — from crawl budget to JavaScript rendering to log file analysis — with the depth that actually moves rankings.
Read article
Core Web Vitals in 2025: What Actually Affects Your Rankings
Core Web Vitals aren't going away — but a lot of what gets written about them is either outdated or overcomplicated. Here's what Google actually weighs in 2025, explained in plain English, with real fixes you can action today.
Read articleReady to close the loop?
See every term in action
Aergos tracks your AI and organic visibility across every channel, in one platform.
Not ready to talk? Audit your site free →