Full disclaimer: guide's co-author here and proteusthemes.com business owner.

I know some people here will rage that this is not "PRO" stuff. At the same time, I see so many people who call themselves web professionals, failing to do the most basic things regarding the image optimization. A full week of work went into writing this article and the entire research. It is, to my knowledge, one of the most comprehensive solutions.

In a week since we've published it over 7k viewed the article and we're getting a great feedback. And we've already iterated it a little bit from the feedback we've received.

Thanks, I am here to discuss things further :)