The major parts of SEO are below
-Onpage optimization
-Off page optimization

In my point of view on page an off page seo both are important in SEO.

In SEO, Content is its major part or we can say "Content is King" in SEO. After that, Keywords, Backlinks, and Sitemap are also important. Your Content should unique and effective.

I suggest on-page SEO as the most important part of website optimization. Unique high-quality content also plays a major role along with this.

Thanks to everyone for their replies.

On page and off page.Mainly follow the google guidelines.

major part of SEO is now only blogging - the holiday advisers India

On page and off page are the major part of SEO.

As per my opinion On-page Optimization is major part in SEO. If your on-page is perfect then it will easy for you to get website ranking.

Major part of Seo is On-Page Seo. This is the main part of SEO and the ranking depends this part. On-Page Seo consists of many steps.
If we don't do On-Page Seo, we will never get good result.

Providing high quality relevant content pertaining to the end users query is the most important factor in SEO hands down. OK, back links are extremely important and I have spent years of my life getting them, but search engines are not in the business of serving up highly backlinked sites that have content that is not the most relevant to the end users query. Give them something valuable and you'll get the CTR that will defy all other SEO metrics. If you have 100% CTR for any given query you'll skyrocket to the top of the SERP regardless of backlinking.

As per my opinion On-page Optimization & Off-page optimization is major part in SEO. If your on-page is perfect then it will easy for you to get website ranking.

Major part of SEO is onpage and off page SEO process.