Adaptive Image Compression (AIC)
Serving compressed images reduces the amount of content required to load a page. This feature helps offset less robust connections, such as those formed with mobile devices.
Basically, if your site visitors have slow network speeds, AIC technology can automatically increase compression of JPEG images to speed up loading. On the other hand, AIC results in lossy compression or irreversible compression, and may affect the quality of the images on your site.
Akamai enables this setting by default specifically to help improve your mobile performance. You can disable it, but realize that doing so will likely increase the amount of content needed to load pages on mobile devices.
Next performance setting: HTTP/2