How Does HTML helps SEO.?

[subi]

I have heard from many that learning HTML will improve our survival in SEO, and need help in fixing some of my doubts regarding this topic.

What are the uses of HTML in SEO.?
Which area of SEO depends on HTML.?
Is it essential to have deep knowledge in HTML while in SEO.?

Regards
Subin S
Jr SEO

[Steve Smith]

Optimization of the HTML coding is one of many on-page search engine optimization tasks you can look at when deciding on a content management system, an ecommerce software package and/or when selecting a theme/template for your site. It is also something you can add to your checklist when hiring a web designer.