Lazy loading means you delay loading the AdSense script and ad unit until the user actually scrolls near the ad’s position.
How it works: You use Intersection Observer or a library to detect when the ad container enters the viewport. Only then do you inject the AdSense script.
Basic lazy load example (using Intersection Observer):
document.addEventListener("DOMContentLoaded", function() { const adContainers = document.querySelectorAll('.lazy-adsense');const observer = new IntersectionObserver((entries) => { entries.forEach(entry => { if (entry.isIntersecting) { // Load AdSense script and push the ad let script = document.createElement('script'); script.src = 'https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js'; script.async = true; document.head.appendChild(script);
(adsbygoogle = window.adsbygoogle || []).push({}); observer.unobserve(entry.target); } });});
adContainers.forEach(container => observer.observe(container)); });
Pros:
Cons:
Verdict: Perfect for long-form content, infinite scroll pages, and ad units at the very bottom of the page. Do not lazy load your first ad unit above the fold.
Every time a full page of ads loads simultaneously, it triggers dozens of network requests to Google’s servers. This creates "network contention." Your article text, images, and CSS are all fighting with AdSense for bandwidth. The result? A high TTI (Time to Interactive). If your page takes longer than 3 seconds to become interactive, 53% of mobile users will abandon it.
❌ Loading the same AdSense script multiple times – Once is enough.
❌ Lazy loading every ad – Your above-the-fold ad should load immediately.
❌ Hiding ad containers – This violates AdSense policies and can get your account banned.
❌ Using synchronous code – It’s 2024. Just don’t.
Client-side loading involves loading ads directly onto the user's browser using JavaScript. This method allows for more control over ad placement and can improve ad visibility. adsense loading method
Pros:
Cons:
Years ago, the standard AdSense loading method was synchronous. The browser would request the ad, stop rendering the rest of the page, wait for the ad server to respond, then continue. This was simple to implement but catastrophic for user experience.
Result: A slow ad server could delay your entire page load by 500ms–2 seconds. Use async official AdSense script
For publishers, this created a death spiral: slower pages → lower Quality Score → lower ad bids → less revenue.