The mobile web has a weight problem. Too many mobile sites are slow to load, and bloated with unnecessary bells and whistles, leading to a poor user experience.
Chief among the culprits is images, which as we have seen in part 1 of this series, How to optimize your mobile site speed, account for 68% of total page weight. Then, in part 2, we looked at how to reduce the impact of images on the speed of your mobile site, including how to make sure your images are as accessible as can be. This mostly focused on removing images which do not add value, and making the ones you do use work harder.