Off-page SEO (also called external SEO) refers to actions taken outside of your own website to affect your ranking on search engine result pages (SERP). Off-page SEO refers to all SEO tactics that don't involve updating or publishing content on your website. Off-page SEO involves all the actions you take to affect your ranking in search engines outside your website. This can include creating backlinks, being active on social media, and guest blogging.
Off-page optimization is defined as the technique that helps a website to improve its ranking on the search engine results page. These factors work outside the boundaries of web pages. These ranking factors are not directly controlled by the publisher. Off-page optimization is basically concerned with creating links for SEO.
Off-page SEO is a long-term and time-consuming process. It includes the acquisition of backlinks to your website from authority sites, social networks and social bookmarks. Factors outside the page work in the background to improve search rankings. Off-page SEO refers to anything that is done outside of your website with the potential to affect engine rankings.
Link building is the most obvious example of this, but there are many other factors outside the page besides links.