Blog
What is Lazy Loading for Display Ads?
April 5, 2024
Sarah Carlson • Content Manager at AUTH 
Imagine this scenario; You're casually browsing your website excited to check out the shoe trends, when suddenly... crickets. The page takes forever to load. Frustrating, isn't it?
Regardless of the purpose of your website, slow web pages will immediately turn away visitors. If we think about the average page load time, according to Average Speed Index (which measures how long it takes for a web page to display visible elements) standar page load for a computer is 3 seconds, while on mobile 5 seconds. 
Now if you are thinking that your web page takes longer than average, fear not! We've got a trick up our sleeves that's like a gem, in the world of web optimization tools that doesn’t require you to sacrifice your content. It’s called Lazy loading for display ads.

Lazy loading for display ads is a technique used to enhance website performance and improve user experience by delaying the loading of ads until they are actually needed. In other words, ads will only pop up when you really need to see them.
Traditional way of Ad Loading

In the old school method of ad loading all ads on a web page are loaded away soon as you land on the site. While this approach is simple it often results in wait times for pages to load, on websites with multiple ad placements.
Dynamic method of Lazy Loading for Display Ads

Placeholder Integration; of displaying the actual ad content when you first visit a page placeholders are smoothly integrated instead. These placeholders are usually elements, like boxes or simple graphics.

Scroll Monitoring; By using JavaScript features the website keeps an eye on how you scroll through the page as you navigate around.
When users approach the section where the ad is placed on the website a request is sent to the ad server.

The actual ad content is fetched from the server. Replaces the placeholder dynamically to ensure an user experience.
Why to use Lazy Loading for Display Ads?
Lazy loading for display ads is a fantastic tool if you want to improve your performance and make sure your visitors stay on the website.
If executed with finesse, implementing lazy loading for display ads can take your webpage from a sluggish snail to a sleek cheetah.