Jetpack Photon is an image accelerator you can use to speed up the load times of your images comes from Jetpack. Photon is a great, easier and free option to speed up your Website load times by using super fast servers. Photon uses WordPress.com CDN servers to speed up your images load times.
To activate Photon, you need to install Jetpack plugin, authored by Automattic – the parent company of WordPress. After activating Jetpack, go to Jetpack > Settings > Performance and scroll down to Performance & speed options and then toggle on the option Enable site accelerator > Speed up image load times.