External SEO optimization is a set of actions outside the site aimed at improving its authority on the Internet, which in turn increases the credibility of search engines and improves positions in search results.
So, this is the promotional process that enables the site to be recognized in the digital media. External SEO helps you to establish links between your site and other sites.
External optimisation in most of cases based on build external backlinks profile. In SEO terms, the term ‘external link’ usually refers to links that are built on other sites and point back to your domain. These ‘external links’ or backlinks are measured for volume, quality, and relevancy in consideration of how they support the ranking of your page.