WordPress automatically generates multiple versions of images you upload into the Media Library and depending on the theme you’re using, you could have upwards of TEN different versions of the same image.
This is not good for achieving fast page loading times, as those images are usually uncompressed.
Optimizing your images is critical as upwards of 50% of all visitors will leave your site if it takes longer than three seconds to load. (Test your page load times using this tool.)
The video below shows how to use the EWWW image optimizer plugin. I tried it years ago after having a lot of issues with it’s main competitor — WP Smush. (Seems like a lot of other people did too, because the free version of WP Smush got a pretty low rating.)
But oh how things change on the internet… in a speedtest they found the latest version of WP Smush Pro to be much faster. I’d agree! Most likely from improvements done in a major overhaul by the plugin gurus at WPMU Dev.
So, if you have a ridiculously large image library, go for the pro version of the plugin. If your media library isn’t too big, then EWWW should do just fine.
Let’s take a look at how EWWW functions as well as a couple of key settings in case you run into trouble: