The reason he makes it to this list without having a ‘free course’ as such is because the kind of knowledge he shares through his articles and case studies is top notch, and many professionals will swear by it. SEO is such a vast subject that it can be learnt in various ways. What works for someone may not work for you, what works for you may not work for others. But if you need to start getting a feel and flavor of how SEO works and get regular updates about it, then starting reading Backlinko might be a great idea.
Since then, many readers, students and not, have reached out and asked about how they can learn digital marketing. It’s a field that’s been ravaged by spammy information and bad ebooks, and it’s difficult to know where to start and what’s worth learning. I’ve been giving out some form of this advice for the last two years, so I figured it would make sense to organize it and provide it here, for anyone motivated enough to follow it.