Reference is from Google : Click Here to Learn the basics and Advanced version of SEO
You can make sure the right people are viewing your content by making your content search-friendly. Search engine optimization, or SEO, is the process of increasing the visibility of website pages on search engines in order to attract more relevant traffic. Learn what you can do to make sure that your site works well with Google Search.
Search engine optimization is the process of making your site better for search engines. It’s also the job title of a person who does this for a living: We just hired a new SEO to improve our presence on the web.
If you have a website on an automated web hosting platform like Blogger, Wix, or Squarespace, or run a small business and don’t have much time to put into your website, it’s worth learning the basics of managing your presence in search engines. A little knowledge can go a long way toward helping people find your site.