My application is a gallery-based application. Usually I have 20 images in a page with around 15 ads (I can't remove amount of images or ads)
Images are all optimized. I use
Lazy load can't know if ads have been loaded, making ads
defer=true will give some helps but you might lose some ad impressions since ads are loaded
after. Best way is to optimize the image and remove
lazy load on pages with many ads and images in same page.