Thanks for sharing this information.

The aspect in SEO both on page optimization and off page optimization.

SEO is a marketing discipline focused on growing visibility in organic (non-paid) search engine results. SEO encompasses both the technical and creative elements required to improve rankings, drive traffic, and increase awareness in search engines. There are many aspects to SEO, from the words on your page to the way other sites link to you on the web. Sometimes SEO is simply a matter of making sure your site is structured in a way that search engines understand.

SEO isn't just about building search engine-friendly websites. It's about making your site better for people too. At Moz we believe these principles go hand-in-hand.

This guide is designed to describe all areas of SEO—from finding the terms and phrases (keywords) that generate traffic to your website, to making your site friendly to search engines, to building links and marketing the unique value of your site. If you are confused about this stuff, you are not alone, and we're here to help.

Great information thanks for sharing.

On page and off page are primary aspects of SEO. Content is backbone.

On page and off page SEO both are important for the promotion of your site, it gives you both traffic and ranking on search engine pages.

The principle point of a SEO is to get the activity on the site that they are working for.
On-Page and Off-Page

Technical crawlability.
Website content publishing.
Keyword relevance.
Link backs (referral links)
Social Media interactions.

The aspects of SEO are: technical SEO, content, on-page optimization, off-page optimization, etc.