Since you inquire regarding on page SEO, indicate you have an idea regarding on page SEO, as a result, the question is what is the first step of on page SEO?
First I like to tell you on page SEO cover following
- Keyword research
- Post description
- H1 title tag
- Keyword placement
- Permalink
- Keyword density
- Keyword proximity
Keyword research is extremely significant in SEO and to the placement of keyword, you can put your keyword in your article at the following place
- Use keyword in permalink
- H1 and H2
- In Meta title tag
- End of article
- Keyword in image
- Make bold and italic to your keyword and place at starting of it.
I also suggest you to use LSI keyword it is the most important aspect you did not want to ignore it.