Hello @drauth !
Hope you’re doing well today!
I’ve ran a check on Google’s PageSpeed Insights as GTMetrix is using their service as well so it’s mostly the same thing.
From the results in the Defer offscreen images recommendations I see that it relates to background images added via CSS code and using the background-image property.
This is a very recent recommendation added by Google as up to recently, they only required images added through the img tag to be lazily loaded. You can see it’s a new thing because it’s not perfect – the first image they are mentioning is from the slider at the top of the page, which is immediately visible when someone visits the page. Which is incorrect.
As a recent recommendation, it’s currently being worked on by developers of all image optimisation plugins, including our Smush team. Some possible solutions for this are already starting to appear but they are definitely not production-ready yet and can’t be really used yet on actual sites.
We will be adding this feature to Smush’s Lazy Loading as soon as the solutions become better and more reliable. Despite that, it’s still a good idea to keep lazy loading enabled as it will help with the remaining images.
Warm regards,
Pawel
