I've been working to improve some of my scores for Page Speed Insights and an issue I keep tripping over is Google complaining about bloated images.
MY images are compressed enough to keep Google happy, but some of YOUR banners being served by the ad network or affiliate network are so overweight that they're costing me points on my Page Speed score.
Some of the banners I've seen Google complaining about were bloated as much as 90%.
Please, please PLEASE take the time to compress your banner images before you upload them to the network!