While on-page SEO refers to factors you can control on your own website, off-page SEO refers to page ranking factors that occur outside of your website, such as backlinks from another site. It also includes your promotion methods, taking into account the amount of exposure something receives on social media, for example. Off-page optimization is defined as the technique that helps the website 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 basically deals with link building for SEO. Off-page SEO is a long-term and time-consuming process, including acquiring backlinks to your website from authority sites, social media, and social bookmarks. Off-page factors work in the background to improve search rankings.
On-page SEO involves all the on-site techniques you can use to ensure that a web page ranks in a SERP. It can also help determine how well that page ranks. Off-page SEO refers to all SEO tactics that don't involve updating or publishing content to your website. Off-page SEO involves all the actions you take to impact your search engine rankings that fall outside your website.
This may include creating backlinks, being active on social media, and blogging as a guest.