Hashmi site has provided a free course on SEO. This site is best for SEO learners, those who want to know what is SEO? What are On-page and Off-page SEO? How to build an SEO-friendly website? What is SEO in Digital Marketing?
On the Hashmi site, you can read a book about SEO. This is an amazing book. The answers to all these questions and much more are described in a very good manner.
Hashmi 