Lazy Load: what is it and what is the impact on SEO

Lazy Load: what is it and what is the impact on SEO

Google released a note regarding the importance of Lazy Loading for SEO, even though the speed of a site is not a direct ranking factor, but a tiebreaker.

With this, many webmasters have migrated their sites to website hosting servers for Web Vitals and implemented deferred loading of images.

This article covers:

What is Lazy Load?

Lazy Loading is a feature that aims to make a page faster by postponing the loading of images, scripts, embeds and stylesheets.

How does Lazy Load work in practice?

Lazy Load causes the site to load as a whole, leaving out only deferred resources, which are loaded after the website loads.

Lazy Load: what is it and what is the impact on SEO

How does Lazy Load technically work?

When you open a website, the Browser creates the DOM (Document Object Model) of the page leaving out deferred objects such as images, videos, scripts, and stylesheets.

After the page is fully loaded, deferred objects are loaded along the scroll.

If you are still using CDN to distribute your content, it is likely that the user will not even notice that the features have been delayed, which further contributes to the browsing experience.

Why use Lazy Load?

Many users slow down a site in a hurry, which increases the bounce rate, so with this in mind, Google implemented Core Web Vitals to encourage sites to go faster and provide a better experience for users.

According to some studies, a page that takes 4 seconds to load, loses approximately 25% of users.

On the other hand, pages that have a 10-second load, lose about 50% of users.

Amazon, the world's largest market place, has found that with every second more load on the site, 1.6 billion dollars a year is lost.

What are the benefits of Lazy Load?

Among the main benefits of Lazy Loading, the main ones are:

  • Increase in organic positioning;
  • Increase in organic traffic;
  • Indirect site revenue increase;
  • Ability of the page to hold more features and content without negative impact on SEO;
  • Page speed is a ranking factor in mobile searches.

What are the best Lazy Loading plugins for SEO?

There are several Lazy Load plugins for WordPress, check out the best ones.

1. Smush

The Smush plugin for Wordpress has several features like:

  • Image compression;
  • Lazy Load;
  • Image resizing;
  • CDN;
  • And several others.

2. Rocket Lazy Load

The Rocket Lazy Load plugin for Wordpress delays loading of images and iframes, making your site faster.

3. Image optimization & Lazy Load by Optimole

The Image optimization & Lazy Load by Optimole plugin for Wordpress compresses images without losing quality, works automatically, supports all market formats and has a free CDN.


When Holistic SEO is put into practice, Lazy Loading becomes a fundamental resource to increase the performance of the results obtained.

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Lucas Ferraz

Lucas Ferraz

Specialist in SEO, traffic increase and lead generation.
More than 310 campaigns in the portfolio.
Certified by Blue Array Academy and SEMRush.

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