After install, the Lazy Load Extension will run on Category, Product View and Related Products or Up Sell. If you like to make it run on other pages here are a few simple steps:

1. Add the html class "lazy" to the img element

2. Add the html data-original attribute with the path to the image

3. Add a image in "src" attribute which will be displayed before the image loads (usually it's a gif animated image)

Here is the full example (<img class=“lazy” src=“path/to/loader-image/loading.gif” data-original=“path/to/image/image.jpg” alt=“” />)