Large graphics can slow down your WordPress site. They’re also a menace to manage when you change the theme — you can end up with an ugly site if your images aren’t resized.
Help is at hand. If you’re using Jetpack, some of your image challenges will be eliminated.
There’s more about Photon here, Photon — Jetpack for WordPress:
“Photon is an image acceleration and editing service for sites hosted on WordPress.com or on Jetpack-connected WordPress sites. Simply click the ‘Activate’ button for Photon on the Jetpack page in your blog dashboard, and your images will be served dynamically from the global WordPress.com cloud. That means less load on your host and faster images for your readers.”
I’ve just started using Photon, and I’m very happy with it. One less thing to worry about. :-)